钻机由电机皮带传动通过（）达到正常工作。
A.齿轮箱
B.立轴
C.液压系统
参考答案：C
Fully ________ in preparing for the coming exam, she no longer has time to enjoy the various activities in her neighborhood.
A．devoted
B．contributed
C．attended
D．absorbed
通过拮抗醛固酮受体发挥利尿作用的利水渗湿药是（）
A.茯苓
B.泽泻
C.苦参
D.猪苓
E.茵陈
