消防车集中润滑系统由于计量精确,比人工润滑方式节省润滑脂高达()%。
A.40.0
B.50.0
C.60.0
D.70.0
参考答案:C
.Although it had been______ struggle for him to finish the experiment, he enjoyed the result with________ satisfaction.
A.the, /
B.a, /
C.a, a
D./, a
睑腺炎有可能形成眼睑蜂窝织炎的情况有
A.抵抗力差的儿童
B.老年人
C.糖尿病
D.过早切开睑
E.用手挤压