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【单选题】
______ is often the case is that Tom doesn’t study hard and fails in passing an exam.A.
That
B.
As
C.
It
D.
What
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【简答题】当心交感神经兴奋时,可使心率( ), 心肌收缩力( )。
【单选题】（ ）languages enable nonprogrammer to use certain easily understood commands to search and generate reports from a database.
A.
Machine
B.
Assembly
C.
High-level
D.
Query
【简答题】-Our class planted 100 trees in the Park on tree-planting Day.-_____!A. Well done B. Sounds good C. Have fun D. Congratulations
【简答题】L是以o(0,0),A(1,0),B(0,1)为顶点的三角形,
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