187÷65×（-75）
=187×56×（-75），
=-3；
故答案为：-3．
— What a surprise! The boy, who used to be shy and quiet, got the first place in the English Speech Contest.
— He must have made great _____ to achieve it.[ ]
A. efforts
B. effect
C. progress
D. impressions
称量时，数字显示不稳，下面处理错误的是（）。
A.关闭防风罩
B.放好防风环
C.检查簧片是否有断损
D.给被称物加盖
