Father will not _______ us to use his recorder.
A.have
B.let
C.agree
D.allow
答案:D
血清壁细胞抗体阳性多见于()
A.慢性浅表性胃炎
B.慢性萎缩性胃窦胃炎
C.慢性萎缩性胃体胃炎
D.胃溃疡
E.胃息肉
采用增重法和增幅法检验起重力矩限制器时,有什么基本要求?