搜题请搜索小程序“爱下问搜题”
问题
填空题
检查蓄电池，要先断开闸刀，严禁将（）放在蓄电池上。
答案
参考答案：金属工具
选择题
— Look! That man looks like Mr. Brown.
— It _____ be him, for he _____ America.
A. can't, has gone to
B. may not, has gone
C. mustn't, has been to
D. can't, has been to
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单项选择题
肠源性发绀见于（）
A.有机磷中毒
B.酒精中毒
C.亚硝酸盐中毒
D.大肠杆菌毒素吸收
E.内毒素休克
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