题目内容

We have to ______ tools for our projects by Friday.

A. decide
B. choose
C. miss
D. hang out

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I felt ______ and shy around the new students.

A. safe
B. decent
C. miss
D. awkward

Tom was happy with the ______ grade he received on his exam.

A. decent
B. awkward
C. wonder
D. safe

什么叫试探电荷(或试验电荷,检验电荷)?

构成零件几何特征的()、()、()统称为几何要素(简称要素)。

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