When the actor appeared on the stage again, shouts and cheers broke______from the crowd and continued for about five minutes.
A. in
B. off
C. forth
D. up
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下列系统中,不属于保护接零的是()。
A. TN-S
B. TN-C-S
C. TN-C
D. TT
Richard has an______manner, although he comes from a middle-class family background and has received his education at Cambridge.
A. abrupt
B. absurd
C. active
D. agreeable
Based on the results of Study 1, the average monthly wet deposition for Cu2+ over the 12-month period was:
A. less than 50 μg/m2.
B. between 50 μg/m2 and 75 μg/m2.
C. between 75 μg/m2 and 100 μg/m2.
D. greater than 100 μg/m2.
截至2012年10月,()的成分股就是由香港交易所上市的较有代表性的50家公司的股票构成。
A. 恒生指数
B. 国企指数
C. 红筹股指数
D. H股金融指数