According to the writer, what may chiefly be responsible for the Columbia accident？
A supposed damage to the left wing of the spacecraft.
B. The deliberate rejection of satellite images offered.
C. A sense of sentiment and arrogance involved.
D. The space agency's inaction during its mission.
查看答案
混凝土或抹灰基层涂刷溶剂型涂料时，含水率不得大于()。
A. 7%
B. 8%
C. 9%
D. 10%
经济资本就是账面资本。 ()
A. 正确
B. 错误
According to the passage, which of the following is NOT true？
A. There is no popularity that really counts.
B. What many parents are doing is in fact hindering their children from finding their own paths.
C. It is not necessarily bad for a teenager to disagree wit his or her classmates.
D. Most teenagers are not actually rebelling.
What docs Dr. Charles Binkley mean by "doctors should be bound by their conscience, not by
A. Doctors should not abide by government's regulations.
B. The government is interfering too much.
C. The regulations about workweek and work shift are too specific.
D. Law can not force a doctor to sleep while his conscience can.
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