His wife ______ his children was invited to the party.
A.and
B.or
C.aswellas
D.butalso
答案:C
慢性失血所致贫血宜选用的药物是()。
A.尿激酶
B.双香豆素
C.叶酸制剂
D.维生素K
E.铁制剂
进行探放水作业时,止水套管的接头必须用棉丝、铅油严加密封。