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【单选题】
检查砷盐中加入适量碘化钾的作用是( )
A.
防止盐酸分解
B.
防止砷化氢逸失
C.
将五价砷还原为三价砷
D.
防止锌粒被氧化
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参考答案:
举一反三
【单选题】Internet 远程登录的协议是( ),它允许用户首先在一网的计算机上登录到一个远程分时系统中,然后像使用自己的计算机一样使用该远程系统。
A.
ftp
B.
www
C.
telnet
D.
ping
【简答题】Good evening, everyone! Let’s talk about some of the new and the old everyday shows. The news is on Channel(频道) Six from 6:00 to 7:00 every evening. Johnson has been reading the news for many years. H...
【单选题】目前中国经济对世界经济的增长贡献率超过()%
A.
30
B.
40
C.
50
D.
20
【简答题】阅读理解 Jim is an English boy. He comes to China with his father and mother. They come here to work Jim comes here to study. He is in No. 5 Middle School. He gets up early everyday. He isn't late for sch...
【简答题】阅读理解。 Kyle lives in London. His father has a shop there and his mother is a shop assistant. He's six years old now and begins to go to school this autumn (秋天). It's a little far from their shop and hi...
【判断题】Telnet允许用户在一网的计算机上登录到一个远程分时系统中,然后像使用自己的计算机一样使用该远程系统。
A.
正确
B.
错误
【简答题】听短文,回答问题。 1. What's Jack's biggest problem? A. He has much time to play. B. He's too busy. C. He must get up late and go to bed early. 2. Where is Jack everyday now? A. In the park. B. At home. C. At ...
【单选题】一完全竞争行业内的厂商面临的市场价格为15元,其每天生产1000单位,总成本为18000元。这一厂商
A.
应当扩大产出以减少损失
B.
应当减少产出以减少损失
C.
应当停产以减少损失
D.
条件不足,无法确定
【简答题】我国目前经济保持中高速增长,综合国力和国际影响力显著提升,经济总量稳居世界第()位,对世界经济增长贡献率超过()%。
【单选题】目前,我国经济保持中高速增长,综合国力和国际影响力显著提升,经济总量稳居世界第二位,对世界经济增长贡献率超过( )。
A.
20%
B.
30%
C.
40%
D.
50%
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