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【单选题】
我 国 制定的 3岁以上儿童 有效刷牙率为A.
20%-50%
B.
50%-80%
C.
60%-90%
D.
40%-70%
E.
以上都不是
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反馈参考答案：
举一反三
【简答题】The lengths of three sides of a are √29, √40, and 5, respectively. Then the area of this is ___.
【简答题】Fillin the blanks in the following sentences with the appropriate forms of the word“subject . ” 1.The tyrant kept the people in _____. 2.Everyone is _____ to death. 3.The campers were ______ to extr...
【简答题】Fillin the blanks in the following sentences with“ immunity, immunized, immune.” 1.Officials of all foreign countries receive diplomatic ______. 2.People whose immune systems have fought the infection...
【判断题】The works of Li Bo and Tu Fu are the best examples of the glory of Tang poetry.(para. 1)
A.
正确
B.
错误
【单选题】No one could ever ___________ ths government of not caring about the poor.
A.
accuse
B.
charge
C.
condemn
D.
prosecute
【单选题】The purpose of the simulation is to estimate mean vehicle queue lengths and delays for various vehicle ______and train frequencies.
A.
popularity
B.
densities
C.
intensities
D.
prosperity
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