【多选题】
NB-IoT上行 的时隙长度为( ).
A. 2ms
B. 4ms
C. 1ms
D. 0.5ms
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【单选题】
What does the word “corrupt” in Para.4 mean?__________ ___
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【单选题】
What would be the best title of this passage?_____________ ___
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What troubles lie detector researchers most is that _______________. ___
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Which of the following is NOT MENTIONED in the third paragraph? __________ ___
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【单选题】
The author's purpose in writing this passage is to ______. ___
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【单选题】
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Every day there are over_____high school students who will become regular smoker. ___
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By "dropout" the author means______. ___
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The reason for declining adolescent smoking is that ________. ___
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【单选题】
What is implied but not stated by the author is that ________. ___
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