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【单选题】
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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举一反三
【单选题】听力原文：M: When shall we start? F: Now it's 8: 30. We'll start half an hour later. When will they start?
A.
At 8:00.
B.
At 8:30.
C.
At 9:00.
【单选题】Mr Brown is an experienced doctor. He is always as cool as a cucumber __________ faced with emergency.
A.
because
B.
before
C.
when
D.
after
【简答题】We realized from this experience _______ when faced with er, we should stay calm.
【单选题】What should we do when faced with a contrastive situation?
A.
Do nothing
B.
Act flexibly
C.
Act blindly
【简答题】景区的_________为游客体验管理提供了有效工具
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