皮皮学,免费搜题
登录
搜题
【多选题】
下列关于各类防毒面具的说法中,正确的有{.XZ
A.
防毒面具用于防止有机气体通过口或鼻吸入人体
B.
全面式供气面具为呼吸系统、眼睛、面部皮肤和头发提供良好的保护
C.
半面式供气面具只对呼吸系统提供良好的保护
D.
供气式防毒面具是通过空气软管向面具中供应新鲜的压缩空气
E.
手掌放到滤芯上并吸气可对滤筒式呼吸器进行负压测试
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】设全集 U ={1,2,3,4},则集合 A ='{1,' 3},则C U A=(  )
A.
{1, 4}
B.
{2, 4}
C.
{3, 4}
D.
{2, 3}
【单选题】一般来说,( )的出票人就是付款人
A.
商业汇票
B.
银行汇票
C.
本票
D.
支票
【单选题】听力原文:W: Have you finished your research report? M: Finished? It would take days. Q: What do we learn from the conversation? (7)
A.
The report is difficult.
B.
The report is very long.
C.
The report has been finished.
D.
The report will be finished in two days.
【单选题】设 ,若f(f(1))=1,则a=(   )
A.
1
B.
2
C.
3
D.
4
【单选题】小儿何年龄起能形成兴奋性和抑制性条件反射:( )
A.
1个月
B.
3~4个月
C.
6~8个月
D.
8~10个月
E.
12个月
【单选题】'The last administration made it perfectly clear. We're being consistent with their policies.' is said by().
A.
David
B.
Karen
C.
American President
D.
Natalie
【单选题】—You’re not angry then? —______. I’ve never laughed so much in my life.
A.
You’re joking
B.
You’ve made it
C.
That’s all right
D.
Far from it
【单选题】全年检修,抽检()%并按年检力矩进行紧固。如发现有一颗螺栓松动则整个节点的螺栓应全部紧固一遍
A.
20
B.
50
C.
10
D.
30
【单选题】设 , ,且满足 则
A.
1
B.
2
C.
3
D.
4
【单选题】设集合 A={2,3, a}, B={1,4}, 且A ∩B ={4 },则a = ( )
A.
1
B.
2
C.
3
D.
4
相关题目: