According to the passage, an active noise-cancellation system______.
A. contains noise rather than negates it
B. eliminates noise rather than muffles it
C. deflects noise rather than baffles it
D. holds noise back rather than stifles it
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设有关系模式:系(系号,系名,办公电话)和学生(学号,姓名,性别,所在系号)。下表是数据的物理存储示意图:
下列文件中,数据存储形式与上表中的存储形式相符的是
A. 堆文件
B. 顺序文件
C. 散列文件
D. 聚集文件
Judging from the context, the phrase "hand-to-mouth" (Line 2, Para. 5) most probably means______.
A. adventurous
B. unhappy
C. wandering
D. unstable
The point of similarity between a complex human society and a complex bee society is______.
A. the division of labor
B. the use of fire
C. the development of industry
D. the development of a written language
Which hotel is the woman staying?
A. Capitol Hotel
B. Hilton Hotel
C. Pamela Hotel