抗磨液压油是在普通液压油中加入高效抗磨添加剂，它适用于压力为16MPa的高压系统。（）
参考答案：对
Though great efforts have been ________on her study,Annie can’t still make any improvements,which makes her parents greatly________.
A．made;surprised
B．done;surprising
C．taken;surprised
D．given;surprising
40℃相当于华氏()。
A．80°F
B．54°F
C．77°F
D．104°F
