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【单选题】
声波测固井质量时，接收到的声波信号越强，说明固井质量（ ）A.
越好
B.
越差
C.
正常
D.
不一定
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【单选题】We should call on people _______ some protective measures _____ protect their from_______
A.
to make, to , being infected
B.
to make , in order to , infection
C.
to take , in order that ,being infected
D.
to take , so as to , being infected
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【单选题】听力原文： The native Americans, the people we call the 'Indians' had been in America for many thousands of years before Columbus arrived in 1492. The Indians were kind to the early settlers. They taught t...
A.
Friendly.
B.
Estranged.
C.
Hostile.
D.
Indifferent.
【简答题】Over thirty thousand years ago，people from northern Asia （亚洲北部） went to America．Today， we call these people Indians（印第安人）． The Indians went to America because the weather began to change．Northern Asia...
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【单选题】The native Americana, the people we call the ' Indians', had been in America for many thousands of years before Christopher Columbus arrived 【61】 1492. The Indians were kind to the early 【62】 They tau...
A.
at
B.
in
C.
for
D.
since
【简答题】阅读理解 Over thirty thousand years ago people from northern Asia went to America. Today, we call these people Indians(印第安人). The Indians went to America because the weather began to change. Northern Asia...
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