【判断题】
由于多模光纤可传输多种模式信号使传输容量倍增，所以该光纤在长途传输中得到广泛应用。
A. 对
B. 错
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答案
B
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【判断题】
综合布线系统应采用建筑物共用接地的接地系统。当必须单独设置系统接地体时，其接地电阻不应大于10Ω。当布线系统的接地系统中存在两个不同的接地体时，其接地电位差不应大于1Vr．m．s。
A. 对
B. 错
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【单选题】
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【单选题】
Q4: What did Stephen learn from this experience?___
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
Q4: According to the survey, how are leisure activities related to age?___
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【单选题】
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【单选题】
Q2: What happened when the man was 13 years old?___
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【单选题】
Q3: Why did the man’s mom give him a big hug?___
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【单选题】
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【单选题】
Q2: According to the passage, what is considered as bad luck?___
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【单选题】
Q3: Why is it considered bad luck to see a black cat crossing one’s path?___
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【单选题】
Q4: According to the passage, what will bring people good luck?___
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【单选题】
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【单选题】
Q2: When does the woman arrive back home by subway?___
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【单选题】
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【单选题】
Q4: How will the new high-speed train affect the man?___
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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