立式钻床操作规程.检查确认各手柄位置无误,再空运转()min,认真检查各部动作,音响是否正常。
A.5
B.10
C.15
D.30
参考答案:B
--- What do you think of him?
--- I hate people ____ talk much but do little.
A.who
B.whom
C.which
D.whose
高尔基复合体中最具特征性的酶是()。
A.糖基转移酶
B.葡萄糖-6-磷酸酶
C.酪蛋白磷酸激酶
D.NADH-细胞色素C还原酶
E.葡萄糖醛酸转移酶