Excuse me, can we ____________ these bags here? [ ]
A. put
B. show
C. give
D. ask
答案:A
下列变化需要加入还原剂才能实现的是 ( )
A.KClO3→O2
B.HCl→Cl2
C.Fe→Fe3+
D.MnO4-→Mn2+
精索静脉曲张的后果是()
A.睾丸发硬
B.睾丸肿胀
C.精索水肿
D.输尿管不通
E.影响睾丸生精能力