A型题 非甾体抗炎药(NSAID)相关性溃疡病，在不能停用NSAID时，最好选用
A. 抗酸剂
B. 胶体铋剂
C. 抗菌药物
D. 质子泵抑制剂
E. 胃动力药
Which of the following terms is defined ill the passage（）
A. Survey (line 1)
B. Public opinion (line 8)
C. Representative sampling (line 13)
D. Response rate (line 22)
It can be inferred from the passage that one reason that sociologists may become frustrated with questionnaires is that（）
A. respondents often do not complete and return questionnaires
B. questionnaires are often difficult to read
C. questionnaires are expensive and difficult to distribute
D. respondents are too eager to supplement questions with their own opinions
What does the passage mainly discuss（）
A. How sediments were built up in oceans during the Cretaceous period
B. How petroleum was formed in the Mesozoic era
C. The impact of changes in oceanic animal and plant life in the Mesozoic era
D. The differences between plankton found in the present era and Cretaceous plankton
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