w、x、y、z都是质数,A=w×w×x×z,B=w×w×x×y,A、B的最大公因数是[ ]
A.w×x
B.w×x×y
C.w×w×x
D.w×x×y×z
答案:C
____Mr Brown’s anger, it was his own son who didn’t agree ____him.
A.To; with
B.Because of; to
C.With; of
D.For; on
汞中毒应该首选的治疗是()
A.依地酸钙钠
B.肾上腺素
C.阿托品
D.二巯丙醇
E.高压氧