皮皮学，免费搜题
登录
搜题
【多选题】
关于氢气, 下列说法错误的是A.
可以在氢气球附近点酒精灯。
B.
在使用氢气的时候，应注意空气流通，周围避免明火、火星、电流火花等。
C.
在 用 氢气球做还原实验时，为了提高反应效率而尽量将氢气球充气更足气压更大。
D.
如果发现氢气泄露，应立即打开门窗通风，及时通知其他人员疏散，并禁止烟火。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】The fire was supposed to be caused by an explosion in_________.
A.
the store's toy department
B.
food court area
C.
the parking garage
D.
electronic appliances area
【简答题】It is my honor to recommend Mr. Li Wei for the position of Director of Technical Department at your Company. Mr. Li worked in a Chinese hospital for four years, and later got his doctorate of medicine...
【简答题】按结构形式划分, PLC 可分为哪几类?
【单选题】The sales departmen twas required to ______ a plan in three weeks.
A.
turn up
B.
get up
C.
come up with
D.
put up with
【简答题】__________ [A] Although no such evidence was presented, the casino’s marketing department continued to pepper him with mailings. And he entered the casino and used his Fun Card without being detected....
【简答题】Financial Management: the importance of maintaining financial control across all departments
【判断题】The Neishi Department dealt with the verification of orders and policies.
A.
正确
B.
错误
相关题目：
参考解析：
知识点：
题目纠错 0
发布
