Which of the following is a true statement
A. Since 1866, use of the metric system in the U.S. has been increasing.
B. Since 1988, the metric system has been the preferred system of weights and measures for U.S. trade and life.
C. In 1988, Congress passed a law to prevent the use of the Customary System in trade and commerce.
D. On Dec. 23, 1975, Pres. Gerald R. Ford signed the Metric Conversion Act of 1975 to adopt the metric system in the U. S.
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We must finish the job, no matter () difficult it is.
A. however
B. how
C. whatever
D. what
患者，30岁，3h前与家人争吵，晚饭后自服对硫磷(1605)，量不详，头晕，头痛，呼吸急促，由家人急送入院，立即给予洗胃，下列哪项错误( )。
A. 插胃管时应避免误人气管
B. 用1:5000高锰酸钾液洗胃
C. 洗胃液每次注入200～300ml
D. 用粗胃管洗胃
E. 先抽光胃内容物再注入洗胃液
热邪壅肺证，可见
A. 咳嗽，咯痰稀白
B. 咳嗽，痰多气泡
C. 咳喘，咯痰黄稠
D. 咳嗽，痰少难咯
E. 咳喘，痰多易咯
The Input Hypothesis was put forward by
A. [A] Chomsky.
B. [B] Sapir.
C. [C] Krashen.
D. [D] Hymes.
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