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【单选题】
The young woman felt ______ when she found that the old woman never said a word.A.
curious
B.
worried
C.
angry
D.
frightened
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反馈参考答案：
举一反三
【单选题】对于真空控制的中央门锁装置,当真空管路出现故障时,将造成真空泄露,它出现故障时的特点是()门锁执行机构不能正常工作,甚至在门锁工作时能听见漏气的声响。
A.
所有
B.
左前
C.
右前
D.
左后
【单选题】More than 800,000 Chinese overseas students have returned in the last five years, with the annual number ______ by an average rate of 36 percent each year.
A.
growing
B.
grown
C.
to grown
D.
having been grown
【单选题】Suppose the market demand curve for a good passes through the point (quantity demanded = 100, price = $25). If there are five buyers in the market, then
A.
the marginal buyer's willingness to pay for the 100th unit of the good is $25.
B.
the sum of the five buyers' willingness to pay for the 100th unit of the good is $25.
C.
the average of the five buyers' willingness to pay for the 100th unit of the good is $25.
D.
all of the five buyers are willing to pay at least $25 for the 100th unit of the good.
【简答题】随机误差又叫 误差,随机误差决定了测量的
【简答题】数字证书是一些标准字段的集合，这些字段包含有关用户或设备及其相应 的信息。
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