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【单选题】
在收集电视收视率数据的几种方法中,成本最高的是()。A.
个人采访回忆法
B.
日记法
C.
仪表法
D.
电话采访回忆法
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举一反三
【简答题】对某边进行往返观测，得观测值分别为87.213m和87.226m，则观测结果为 m。
【单选题】The most important way to reduce pollution is .
A.
for all industries to stop production
B.
for us to stop using automobiles
C.
for the farmers to stop using fertilizers and festicides
D.
for the government and businesses to take action toward reducing pollution
【单选题】Now more and more people walk or ride bikes instead of taking the taxi to reduce pollution. [ ]
A.
air
B.
soil
C.
water
D.
noise
【单选题】在真核细胞中肽链合成的终止原因是( )。
A.
已达到mRNA分子的尽头
B.
具有特异的tRNA识别终止密码子
C.
终止密码子本身具有酯酶作用，可水解肽酰与tRNA之是的酯键
D.
终止密码子被终止因子(RF)所识别，进而诱发终止反应
【简答题】阅读理解 China's government has been trying all measures to reduce pollution in the past few years. Now people can enjoy a fresh environment everywhere. The following two graphs are adopted from the colum...
【简答题】We have been trying all measures to reduce pollution in the past few years. Now people can enjoy a fresh environment everywhere. The following two graphs are adopted from the column of “City Informat...
【简答题】Ch ina’s government has been trying all measures to reduce pollution in the past few years. Now people can enjoy a fresh environment everywhere. The following two graphs are adopted from the column of...
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