经内镜逆行性胰胆管造影(ERCP)的适应证不包括
A．胆管癌B．急性胰腺炎C．胆管结石D． * * 炎性狭窄E．胰腺癌
参考答案：B
As a new diplomat, he often thinks of _____ he can react more appropriately on such occasions. [ ]
A. what
B. which
C. that
D. how
目前所知毒性最强的毒素是（）
A.炭疽毒素
B.鼠疫毒素
C.肉毒毒素
D.破伤风痉挛毒素
E.卵磷脂酶
