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【简答题】
求圆柱螺线x(t)=(cos t，sin t，t) (t∈R)的渐缩线y(t)．
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举一反三
【单选题】The scientists are still working on ___ ____ new methods of reaching outer space.
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invention
B.
inventor
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inventing
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【判断题】14为了提高传热效率,采用蒸汽加热时必须不断排除冷凝水并及时排放不凝性气体。
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B.
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【简答题】根据短文内容，从下面表格中选择正确的选项填入横线空格处。 A. Scientists are still working on testing them. B. So some clever farmers have solved (解决) the watermelon problem. C. Doctors might be able to use vegetables to fight can...
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【单选题】(2013·青岛一模)Scientists are still wondering ________ the Egyptians built the pyramids so long ago.
A.
how it is that
B.
how is it that
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it is how that
D.
that how it is
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【简答题】________4 Scientists are still unable to satisfactorily explain why we yawn.
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【单选题】Scientists are still unable to come to a/an ______ as to the probable cause of earthquake.
A.
elaboration
B.
prediction
C.
conclusion
D.
resolution
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【单选题】一项100万的借款,借款期限为3年,年利率8%,如果每半年复利一次,则有效年利率会高出名义利率( )。
A.
4%
B.
0.24%
C.
0.16%
D.
0.8%
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【判断题】为了提高传热效率，采用蒸汽加热时必须不断排除冷凝水并及时排放不凝性气体。
A.
正确
B.
错误
查看完整题目与答案
【简答题】Today, scientists are still concerned about the _______ of some rare species of animals.
查看完整题目与答案
【判断题】为了提高传热效率，采用蒸汽加热时必须不断排除冷凝水并及时排放不凝性气体。 （ ）
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】The scientists are still working on ___ ____ new methods of reaching outer space.
A.
invention
B.
inventor
C.
invent
D.
inventing
查看完整题目与答案
【判断题】14为了提高传热效率,采用蒸汽加热时必须不断排除冷凝水并及时排放不凝性气体。
A.
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B.
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【简答题】根据短文内容，从下面表格中选择正确的选项填入横线空格处。 A. Scientists are still working on testing them. B. So some clever farmers have solved (解决) the watermelon problem. C. Doctors might be able to use vegetables to fight can...
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【单选题】(2013·青岛一模)Scientists are still wondering ________ the Egyptians built the pyramids so long ago.
A.
how it is that
B.
how is it that
C.
it is how that
D.
that how it is
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【简答题】________4 Scientists are still unable to satisfactorily explain why we yawn.
查看完整题目与答案
【单选题】Scientists are still unable to come to a/an ______ as to the probable cause of earthquake.
A.
elaboration
B.
prediction
C.
conclusion
D.
resolution
查看完整题目与答案
【单选题】一项100万的借款,借款期限为3年,年利率8%,如果每半年复利一次,则有效年利率会高出名义利率( )。
A.
4%
B.
0.24%
C.
0.16%
D.
0.8%
查看完整题目与答案
【判断题】为了提高传热效率，采用蒸汽加热时必须不断排除冷凝水并及时排放不凝性气体。
A.
正确
B.
错误
查看完整题目与答案
【简答题】Today, scientists are still concerned about the _______ of some rare species of animals.
查看完整题目与答案
【判断题】为了提高传热效率，采用蒸汽加热时必须不断排除冷凝水并及时排放不凝性气体。 （ ）
A.
正确
B.
错误
查看完整题目与答案
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