English didn't become the official language of the England until______ after the Hundred Years' War.
A. [A] 12th
B. [B] 13th
C. [C] 14th
D. [D] 15th
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Two systems of weights and measures used in the U.S. are ______.
A. the U. S. Customary System and the metric system
B. the International System and the metric system
C. the Imperial System and the metric system
D. the Customary System and the Imperial system
The author' s tone is ______.
A. objective
B. sarcastic
C. negative
D. skeptical
Students self-rating on "emotional health" and "physical health" reached all-lime lows. The reason may be ______.
A. the increasing competitive pressures
B. problems at home
C. increasing stress
D. strong interest in health protessions
小儿肺炎应用抗菌药物治疗时，其停药时间一般是
A. 体温正常，咳嗽消失
B. 体温正常后3-4天，症状消失
C. 体温正常后6-10天，症状消失
D. 体温正常后5-7天，肺部体征消失
E. 体温正常后5-7天，临床症状基本消失后3天
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