在土壤缺氮的情况下,植物的生长发育迟缓或停滞,这时应施用化肥是[ ]
A.KCl
B.NH4C1
C.K2CO3
D.Ca(H2PO4)2
答案:B
亚急性感染性心内膜炎最常见的死亡原因是()
A.细菌性动脉瘤破裂
B.脑栓塞
C.心力衰竭
D.肾功能不全
E.脾破裂
The best method to________this goal is to unite as many sympathetic people as possible with the labor
movement itself.[ ]
A. win
B. accomplish
C. finish
D. complete