Which of the following does not belong to dialectal varieties？
A. Regional dialect
B. Sociolect
C. Idiolect
D. Register
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One of the contributions Searle has made is his classification of______act.
A. locutionary
B. illocutionary
C. perlocutionary
D. speech
单位需求弹性为零时调整价格，对总收益没有影响。()
烟草中导致吸烟者发生肺癌的主要有害物质为
A. 烟碱
B. 焦油
C. 一氧化碳
D. 苯并芘
E. 尼古丁
片剂包衣过称中出现“起泡”的原因是()
A. 干燥过慢
B. 干燥过快
C. 转速过慢
D. 转速过快
E. 固化时间长
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