【单选题】
( ) 27. What does the prince do after the fox tells him a secret? A.He cares more about a flower and a sheep. B.He meets many more strange adults on other planets. C.He realizes his love for the rose and he goes back to his planet.   D.He discovers interesting things such as a snake, other roses and a fox.
A. A
B. B
C. C
D. D
查看试卷,进入试卷练习
微信扫一扫,开始刷题
答案
C
解析
C
相关试题
【单选题】
( ) 28. What does "The little Prince" mainly talk about? It' s about _________. A.the adult world B.the planet B -612 C.a rose and a fox D.the adventure of a young
A. A
B. B
C. C
D. D
【单选题】
( ) 29. When a baseball player hits the ball, he must ______ to get a point. A. run to each base freely B. touch the home plate first C. touch all the bases with his hands D. run to each base in order and touch it with his foot
A. A
B. B
C. C
D. D
【单选题】
( ) 30. When was the importance of touching all the bases shown? A. Before the baseball rules made. B. At the end of the 1974 baseball seasons. C. At the start of the 1974 baseball seasons. D. In the second week of 1974.
A. A
B. B
C. C
D. D
【单选题】
( ) 31. Who hit home run number 715? A. Babe Ruth. B. Hank Aaron. C. Babe Ruth’s partner. D. Hank Aaron’s friend.
A. A
B. B
C. C
D. D
【单选题】
( ) 32. What does the expression “to touch all bases” mean? A. To try your best to set a new record. B. To get a chance to be the greatest hitter. C. To do what is needed to finish an activity. D. To solve the problems successfully.
A. A
B. B
C. C
D. D
【单选题】
( ) 33. The Chinese Yellow Sea Wetlands are in the _______ of China.    A.south           B.east    C.west            D.north
A. A
B. B
C. C
D. D
【单选题】
( ) 34. Usually the weather in the wetlands is _______.    A.hot             B.pleasant   C.cold            D.dry
A. A
B. B
C. C
D. D
【单选题】
( ) 35. The World Wetlands Day is on _______.    A.February 2        B.June 25   C.April 22      D.March 22
A. A
B. B
C. C
D. D
【单选题】
( ) 36. We must protect wetlands because _______. A.they are home for wildlife   B.they can prevent flood    C.they can offer food to the animals and birds D.all of the above
A. A
B. B
C. C
D. D
【单选题】
( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
A. A
B. B
C. C
D. D
【单选题】
( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
A. A
B. B
C. C
D. D
【单选题】
( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
A. A
B. B
C. C
D. D
【单选题】
( ) 40. The best title of the passage is ___________. A. Rivers in Cities B. The importance of Rivers C. Transportation D. Natural Resources
A. A
B. B
C. C
D. D
【单选题】
1.—Hello! This is Henry Speaking.I’d like to speak to your father. —Sorry, he has Shanghai. A. been in B. been to C. come to D. gone to
A. A
B. B
C. C
D. D
【单选题】
2. — It’s difficult for the village children to cross the river for school. — I think a bridge ______ over the river. A. was built B. is being built C. has been built D. should be built
A. A
B. B
C. C
D. D
【单选题】
3. —Where would you like to go, Jinan or Qufu? — .I only want to go to Qingdao. A. Each B. Either C. Neither D. All
A. A
B. B
C. C
D. D
【单选题】
4. — The documentary A Bite Of China II is quite popular around China recently. How do you like it? — ______. A. I think so B. Pretty good C. It’s my pleasure D. All right
A. A
B. B
C. C
D. D
【单选题】
5. There are three English-books on the shelf, but ______ of them is mine. A. both B. neither C.all D. none
A. A
B. B
C. C
D. D
【单选题】
6. When the parents arrived at the hall, the students _______ their projects. A. have finish B. finished C. had finished D. are finishing
A. A
B. B
C. C
D. D
【单选题】
7. This week, the _______ seems to change every day: one day is hot; the next day is cold. A. time B. weather C. season D. way
A. A
B. B
C. C
D. D
【单选题】
8. He never does his work _______ Mary.    A. as careful as B. so careful as C. carefully as D. as carefully as
A. A
B. B
C. C
D. D
【单选题】
9. — Can he jump high? — Yes, he ______. He is a good high jumper. A. must B. need C. can D. shall
A. A
B. B
C. C
D. D
【单选题】
10. The shop _____ at 8:00 a.m.and it ________ for ten hours every day. A. is open; has opened B. is opened; opens C. opens; is open D. opened; opens
A. A
B. B
C. C
D. D
【单选题】
11. —Excuse me, may I use your bicycle? ______ is broken. —Certainly. But remember to return it before lunch. A. Mine B. Me C. Myself D. I
A. A
B. B
C. C
D. D
【单选题】
12. —Simon, what do I need to take for the hiking? —You’d better ________ more water than usual. It’s hot today. A. to take B. taking C. take D. took
A. A
B. B
C. C
D. D
【单选题】
13. Helen ______ to a language school when she was seven. A. sent B. is sent C. will send D. was sent
A. A
B. B
C. C
D. D
【单选题】
14. — Is this park you’ve visited recently? — Yes, it's the most beautiful one I’ve ever visited before. A. that B. the one C. which D. the one which
A. A
B. B
C. C
D. D
【单选题】
15. — It’s difficult for the village children to cross the river for school. — I think a bridge ________ over the river. A. should be built B. is being built C. has been built D. was built
A. A
B. B
C. C
D. D
【单选题】
16. — Could you tell me when Mr. Li ________ in Huaibei?    — Sure..When he ________, I’ll call you.    A. arrives; will arrive B. will arrive; will arrive C. arrives; arrives D. will arrive; arrives
A. A
B. B
C. C
D. D
【单选题】
) 17.There is ________ 800-metre-long road behind ________ hospital. A. an; an B. an; the C. a; a D. a; the
A. A
B. B
C. C
D. D
【单选题】
18. — Did you see a girl in yellow pass by just now? — No, sir. I ________ a magazine. A. read B. am reading C. was reading D. would read
A. A
B. B
C. C
D. D
【单选题】
19.In fact, my parents are not only kind to me, but also strict ________ me. A. at B. to C. for D. with
A. A
B. B
C. C
D. D
【单选题】
20. The boy_____ a yellow sweater can_____ himself now. A. wearing; dress B. putting on; wear C. put on; dress D. dressing; wear
A. A
B. B
C. C
D. D
【单选题】
21. —Jack, I haven’t seen your brother for a long time. — He ________Shanghai on business for two months. A. went to B. has gone to C. has been in D. has been to
A. A
B. B
C. C
D. D
【单选题】
22. The meat with eggs tastes ______. Would you like some more? A. nice B. well C. bad D. wonderfully
A. A
B. B
C. C
D. D
【单选题】
23. — Look! The man standing at the gate ______ be our headmaster. — No, it _______ be him.He is holding a meeting in the office now. A. must; can’t B. must; mustn’t C. can’t; can’t D. can’t; mustn’t
A. A
B. B
C. C
D. D
【单选题】
24. The Japanese government must do everything ________ polluted water from running into rivers, lakes, seas and oceans. A. keep B. kept C. Keeping D. to keep
A. A
B. B
C. C
D. D
【单选题】
25. —Hi, Jack.Did you go to Jim’s birthday party? —No, I felt so sad.I . A. didn’t invite B. am not invited C. wasn’t invited D. hadn’t invited
A. A
B. B
C. C
D. D
【单选题】
( ) 26. Where does the writer of "The little Prince" come from? A.England. B.France. C.America. D.China.
A. A
B. B
C. C
D. D
【单选题】
( ) 27. What does the prince do after the fox tells him a secret? A.He cares more about a flower and a sheep. B.He meets many more strange adults on other planets. C.He realizes his love for the rose and he goes back to his planet.   D.He discovers interesting things such as a snake, other roses and a fox.
A. A
B. B
C. C
D. D
推荐试题
【单选题】
ABO07 交流电的频率越高;趋肤效应的现象___。
A. 越严重
B. 较严重
C. 减弱
D. 消失
【单选题】
AB007 采用表面涂有薄层绝缘漆或绝缘的氧化物的薄硅钢片叠压制成的铁芯,___涡流。
A. 减弱了
B. 增强了
C. 限制了
D. 阻断了
【单选题】
AB008 在表示正弦交流电的解析式i=sin(ωt+ϕ)中,ϕ表示___。
A. 频率
B. 相位
C. 初相角
D. 相位差
【单选题】
AB008 u=sin(ωt+ϕ)是正弦交流电压瞬时值的表达式,其中表示___。
A. 最大值
B. 有效值
C. 频率
D. 初相角
【单选题】
AB008 某交流电压u=380sin (314t+ )V,此交流电压的有效值为___。
A. V
B. V
C. 380 V
D. 220 V
【单选题】
AB009 正弦交流电的波形图描绘的是电流的大小和方向随___变化的曲线。
A. 电压
B. 电动势
C. 频率
D. 时间
【单选题】
4.AB009 频率越大,说明交流电1s内变化的次数越多,则周期___。
A. 越小
B. 越大
C. 不变
D. 为1
【单选题】
AB010 用旋转矢量法表示一正弦交流电时,矢量的长度与正弦量的___成比例。
A. 有效值
B. 相位角
C. 频率
D. 瞬时值
【单选题】
AB010 正弦交流电的相量图中每一个相量的长度表示___。
A. 最大值
B. 最小值
C. 瞬时值
D. 有效值
【单选题】
AB011 三相电源绕组末端短接在一起的接法为___。
A. 三角形连接
B. 星形连接
C. 短接
D. 对称连接
【单选题】
AB011 三相交流发电机的三相绕组常采用___连接。
A. 三角形
B. V形
C. 星形
D. 不完全星形
【单选题】
0.AB011 在电源的三角形连接中,线电压___相电压。
A. 是倍
B. 是倍
C. 是3倍
D. 等于
【单选题】
AB012 将三相负载分别接于三相电源的两相线之间的连接方法为___连接。
A. 星形
B. 并联
C. 三角形
D. 串联
【单选题】
AB012 负载作星形连接的三相电路中,通过中性点的电流等于___。
A. 零
B. 各相负载电流的代数和
C. 3倍相电流
D. 各相负载电流的相量和
【单选题】
AB012 在三角形连接中,如果有一·相绕组接反,将会产生的后果是___。
A. 总电势为零
B. 电动势减少
C. 阻抗增大
D. 产生环流
【单选题】
AB013 RLC串联电路中,增大电阻R,将使___。
A. 谐振频率降低
B. 谐振频率升高
C. 谐振曲线变陡
D. 谐振曲线变钝
【单选题】
AB013 在RLC串联电路中,当=时,感抗和容抗作用互相抵消,整个电路呈阻性,这种现象称为___。
A. 并联谐振
B. 串联谐振
C. 谐振
D. 振荡
【单选题】
6.AB013 RI。C并联谐振电路的特点是___。
A. 电路中阻抗最大,电流最小
B. 电路中电流最大,阻抗最小
C. 电阻上的电压小于电源电压
D. 电感上的电压等于电容元件上的电压并等于零
【单选题】
7.AB014 三相电力变压器的容量是指___。
A. 三相输出的有功功率的总和
B. 一相输出的有功功率
C. 三相输出的视在功率的总和
D. 一相输出的视在功率
【单选题】
AB014 已知发电机的有功功率P和无功功率Q,计算视在功率S,正确的公式为___。
A. S=P+Q
B. S=P-Q
C. S=UI
D. S=
【单选题】
AB015 已知变压器额定容量为S,额定功率因数为0.8,则其额定有功功率为___。
A. S
B. 1.25S
C. 0.64S
D. 0.8S
【单选题】
1.AB015 交流电路的功率因数等于___之比。
A. 瞬时功率与视在功率
B. 有功功率与无功功率
C. 有功功率与视在功率
D. 无功.功率与视在功率
【单选题】
AB015 已知电动机三角形连接于380 V三相四线制系统,其三相电流均为10A,有功功率为1.1 4 kW,则功率因数为___。
A. 0.1
B. 0.17
C. 0.33
D. 0.03
【单选题】
AB016 用电压表测量电压的时候,应该把电压表___在电路中。
A. 并联
B. 串联
C. 星接
D. 角接
【单选题】
AB016 将电源和___经小开关用导线连接在一起,就形成了电路。
A. 电流
B. 电压
C. 电阻
D. 设备
【单选题】
AC001 二极管的最大反向电流一般不超过___。
A. 几十微安
B. 几十毫安
C. 1 A
D. 5 A
【单选题】
ACO01 测量二极管正向电阻,应选择万用表的___挡位。
A. R×1
B. R×1 0
C. R×100或R×1k
D. R×10k
【单选题】
AC00l 二极管的反向电流与外加电压___。
A. 成正比
B. 成反比
C. 相等
D. 无关
【单选题】
Ac002 普通三极管的电流放大倍数一般在___为好。
A. 20~100之间
B. 300~500之间
C. 600 ----900之间
D. 1000以上
【单选题】
AC002 三极管放大电 必须满足发射结加( )偏置,集电结加___偏置这个工作条件。
A. 正向;反向
B. 反向;反向
C. 正向;正向
D. 反向;正向
【单选题】
AC003 直流稳压电源由电源变压器、___、滤波电路和稳压电路4部分组成。
A. 整流电路
B. 三极管
C. 放大电路
D. 振荡电路
【单选题】
AC003 直流稳压电源的主要技术指标是直流稳压的要求、___指标和质量指标。
A. 电压
B. 电流
C. 特性
D. 稳压
【单选题】
AC003 稳压电源的特性指标为输出电压、输出电流和___。
A. 输出功率
B. 电压调节范围
C. 稳定度
D. 纹波电压
【单选题】
AC004 单向桥式整流电路的直流输出电压是输入电压的___。
A. 45%
B. 1.41倍
C. 90%
D. 1.2倍
【单选题】
AC004 三相桥式整流电路的直流输出电压是输入电压的___。
A. 90%
B. 1.41倍
C. 4 5%
D. 2.34倍
【单选题】
AC004 全波整流电路中每个二极管承受的最大反向电压为半波整流电路中的___
A. 2倍
B. 1.41倍
C. 45%
D. 2.82倍
【单选题】
AC005 晶闸管的导通条件是阳极一阴极加___电压且( )死区电压,控制极一极加正向触发电压。
A. 正向;小于
B. 正向;大于
C. 反向;小于
D. 反向;大于
【单选题】
AC00 5 晶闸管是一种工作在开关状态下的___半导体器件。
A. 小功率
B. 低频
C. 高频
D. 大功率
【单选题】
AC005 晶闸管有阳极、阴极和控制极,其内有___PN结。
A. 2个
B. 3个
C. 4个
D. 5个
【单选题】
AC006 在晶闸管整流电路中,输出电压随晶闸管控制角的增加而___。
A. 不变
B. 无关
C. 增加
D. 减小