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【简答题】
认真观察A、B两装置， （1）写出B装置中发生反应的文字表达式______．该反应属于______反应 （填分解或化合） （2）用分子和原子的观点分析比较A装置和B装置在试验过程中水的变化情况______． （3）节约水资源，防止水污染是每个公民应尽的责任和义务．下列做法会造成水体污染的有（填序号）______． A．工业废水直接排放      B．工业废气处理后排放 C．禁止使用含磷洗衣粉    D．大量使用化肥、农药 （4）在实验过程中，试管a中产生的气体是______，试管b中产生的气体是______，二者的体积比为______．检验试管a中产生的气体的方法是______．检验试管b中产生的气体的方法是______．
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参考答案：
举一反三
【判断题】军事思想是人们对战争与军队基本问题的理性认识。它来源于丰富的战争实践,并代表一定阶级的意识形态。
A.
正确
B.
错误
查看完整题目与答案
【判断题】军事思想是人们对战争与军队基本问题的理性认识。它来源于丰富的战争实践,并不代表一定阶级的意识形态。
A.
正确
B.
错误
查看完整题目与答案
【判断题】云南的茯苓,河南的 枸杞 ,山东的阿胶等,都是著名的道地药材 。
A.
正确
B.
错误
查看完整题目与答案
【多选题】画一条己知直线的平行线的合适方法有()。
A.
偏移0 FFSET或复制CO PY
B.
用直线LINE命令，使用平行捕捉
C.
直接用构造线XLINE画线
D.
移动MOVE命令中“C”选项
E.
缩放SC ALE命令中“C”选项
查看完整题目与答案
【单选题】Reading Comprehension (1) When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn't that our friends are all very busy ...
A.
sitting and playing chess in the evening
B.
attending classes in the evening
C.
Listening to music in the evening
D.
watching television in the evening
查看完整题目与答案
【单选题】听力原文： When friends come to visit us in the evening, they spend their time telling us that they are in a hurry and looking at their watches. It isn't that our friends are all busy, it is just that we h...
A.
Because they are in a hurry.
B.
Because they are strange.
C.
Because they cannot watch TV.
D.
Because they have other schedules.
查看完整题目与答案
【简答题】When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn’t that our friends are all very busy, it is just that we haven’t...
查看完整题目与答案
【简答题】When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn’t that our friends are all very busy, it is just that we don’t h...
查看完整题目与答案
【简答题】阅读理解。 When our friends come to visit us in the evening, they spend their time telling us they are in a hurry or looking at their watches always. It isn't that our friends are all very busy. It is just...
查看完整题目与答案
【单选题】When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn't that our friends are all very busy it is just that we haven't ...
A.
sitting and playing chess in the evening
B.
attending classes in the evening
C.
listening to music in the evening
D.
watching television in the evening
查看完整题目与答案
相关题目：
【判断题】军事思想是人们对战争与军队基本问题的理性认识。它来源于丰富的战争实践,并代表一定阶级的意识形态。
A.
正确
B.
错误
查看完整题目与答案
【判断题】军事思想是人们对战争与军队基本问题的理性认识。它来源于丰富的战争实践,并不代表一定阶级的意识形态。
A.
正确
B.
错误
查看完整题目与答案
【判断题】云南的茯苓,河南的 枸杞 ,山东的阿胶等,都是著名的道地药材 。
A.
正确
B.
错误
查看完整题目与答案
【多选题】画一条己知直线的平行线的合适方法有()。
A.
偏移0 FFSET或复制CO PY
B.
用直线LINE命令，使用平行捕捉
C.
直接用构造线XLINE画线
D.
移动MOVE命令中“C”选项
E.
缩放SC ALE命令中“C”选项
查看完整题目与答案
【单选题】Reading Comprehension (1) When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn't that our friends are all very busy ...
A.
sitting and playing chess in the evening
B.
attending classes in the evening
C.
Listening to music in the evening
D.
watching television in the evening
查看完整题目与答案
【单选题】听力原文： When friends come to visit us in the evening, they spend their time telling us that they are in a hurry and looking at their watches. It isn't that our friends are all busy, it is just that we h...
A.
Because they are in a hurry.
B.
Because they are strange.
C.
Because they cannot watch TV.
D.
Because they have other schedules.
查看完整题目与答案
【简答题】When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn’t that our friends are all very busy, it is just that we haven’t...
查看完整题目与答案
【简答题】When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn’t that our friends are all very busy, it is just that we don’t h...
查看完整题目与答案
【简答题】阅读理解。 When our friends come to visit us in the evening, they spend their time telling us they are in a hurry or looking at their watches always. It isn't that our friends are all very busy. It is just...
查看完整题目与答案
【单选题】When friends come to visit us in the evening, they spend their time telling us they are in a hurry and looking at their watches. It isn't that our friends are all very busy it is just that we haven't ...
A.
sitting and playing chess in the evening
B.
attending classes in the evening
C.
listening to music in the evening
D.
watching television in the evening
查看完整题目与答案
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