单项选择题
A.
B.
C.
D.
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单项选择题
A.0.5kN,向左B.1kN,向左C.2kN,向左D.3kN,向左
A.0.5kN,向左
B.1kN,向左
C.2kN,向左
D.3kN,向左
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问答题
19. College students are supposed to have the abilities to distinguish ___[填空1]___ right and wrong and not to follow others blindly.
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