吊笼上最高一对安全钩应处于最低驱动齿轮之上。
参考答案：错
Lucy found one of her friends had been ________ after she finished the invitations to her wedding party.
A．taken out
B．put out
C．picked out
D．left out
在强大的习惯面前，科学有时也会变得( )。
A．一无是处
B．苍白无力
C．软弱可欺
D．似是而非
