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【简答题】通过学习，我们能用学到的化学知识解决许多问题： (1) 衣服上的油污可以用汽油洗净，其原理是___________； 也可以用加了洗涤剂的水洗净，其原理是_________________。 (2) 胃酸过多的病人，常服用含有氢氧化镁的药物以减轻病痛，其反应的化学方程式为______________。 (3)使溶解在水中的空气逸出可以采用__________减小气体溶解度的方法。 (4)用稀硫酸清...
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【判断题】对于目标函数求最小值问题的整数规划问题,用分支定界法求解时,松弛问题的目标值是各分支的下界。
A.
正确
B.
错误
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【单选题】听力原文：W: How was the English exam you took yesterday? M: Not as easy as I expected. I did fairly well on the reading section but I made quite a few mistakes on grammar. Q: What did the man say about hi...
A.
His errors were mainly in the reading pan.
B.
It wasn't very challenging to him.
C.
It was more difficult than he had expected.
D.
He made very few grammatical mistakes in his test.
查看完整题目与答案
【单选题】正常情况下，一次失血超过血液总量的将危及生命
A.
5%
B.
10%
C.
30%
D.
15%
E.
20%
查看完整题目与答案
【单选题】大多数细菌繁殖一代所需要的时间为
A.
12小时
B.
40分钟
C.
20分钟
D.
1小时
E.
24小时
查看完整题目与答案
【简答题】（10分）通过一年的化学学习，我们已经掌握了实验室制取气体的有关规律。请结合下图回答： （1）实验室若用A装置作为制取O 2 的发生装置，则反应的化学方程式为 _____ _______，该反应是 反应；若用双氧水和二氧化锰反应制取氧气，应选择的发生装置为_____，写出该反应的化学方程式_________ _____ 。 （2）已知甲烷密度比空气小，极难溶于水。实验室可用加热无水醋酸钠和碱石灰的...
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【简答题】听力原文：Woman: Of course, I was looking forward to it. I mean, it meant seeing the results of quite a lengthy process to find the right person, which I myself had invested quite a lot of time in. It's a ...
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【单选题】出现战汗多提示
A.
邪去正安
B.
邪胜正衰
C.
邪正相争剧烈
D.
阴阳离决
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【单选题】听力原文：M: You look very nice in this dress. Perhaps the waist is a little too tight. Would you like to try a size larger? W: Well, the style. isn't quite what I had in mind. Thank you anyway. Q: Why did...
A.
It was too small.
B.
It was too loose.
C.
It was too expensive.
D.
She doesn't like the style.
查看完整题目与答案
【简答题】通过一年的学习，我们能用学到的化学知识解决许多问题： （1）衣服上的油污可以用汽油洗净，其原理是______； 也可以用加了洗涤剂的水洗净，其原理是______． （2）胃酸过多的病人，常服用含有氢氧化镁的药物以减轻病痛，其反应的化学方程式 为______． （3）若发生重金属离子中毒，可以用来解毒的食物是______． （4）使溶解在水中的空气逸出可以采用______减小气体溶解度的方法．
查看完整题目与答案
相关题目：
【简答题】通过学习，我们能用学到的化学知识解决许多问题： (1) 衣服上的油污可以用汽油洗净，其原理是___________； 也可以用加了洗涤剂的水洗净，其原理是_________________。 (2) 胃酸过多的病人，常服用含有氢氧化镁的药物以减轻病痛，其反应的化学方程式为______________。 (3)使溶解在水中的空气逸出可以采用__________减小气体溶解度的方法。 (4)用稀硫酸清...
查看完整题目与答案
【判断题】对于目标函数求最小值问题的整数规划问题,用分支定界法求解时,松弛问题的目标值是各分支的下界。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: How was the English exam you took yesterday? M: Not as easy as I expected. I did fairly well on the reading section but I made quite a few mistakes on grammar. Q: What did the man say about hi...
A.
His errors were mainly in the reading pan.
B.
It wasn't very challenging to him.
C.
It was more difficult than he had expected.
D.
He made very few grammatical mistakes in his test.
查看完整题目与答案
【单选题】正常情况下，一次失血超过血液总量的将危及生命
A.
5%
B.
10%
C.
30%
D.
15%
E.
20%
查看完整题目与答案
【单选题】大多数细菌繁殖一代所需要的时间为
A.
12小时
B.
40分钟
C.
20分钟
D.
1小时
E.
24小时
查看完整题目与答案
【简答题】（10分）通过一年的化学学习，我们已经掌握了实验室制取气体的有关规律。请结合下图回答： （1）实验室若用A装置作为制取O 2 的发生装置，则反应的化学方程式为 _____ _______，该反应是 反应；若用双氧水和二氧化锰反应制取氧气，应选择的发生装置为_____，写出该反应的化学方程式_________ _____ 。 （2）已知甲烷密度比空气小，极难溶于水。实验室可用加热无水醋酸钠和碱石灰的...
查看完整题目与答案
【简答题】听力原文：Woman: Of course, I was looking forward to it. I mean, it meant seeing the results of quite a lengthy process to find the right person, which I myself had invested quite a lot of time in. It's a ...
查看完整题目与答案
【单选题】出现战汗多提示
A.
邪去正安
B.
邪胜正衰
C.
邪正相争剧烈
D.
阴阳离决
查看完整题目与答案
【单选题】听力原文：M: You look very nice in this dress. Perhaps the waist is a little too tight. Would you like to try a size larger? W: Well, the style. isn't quite what I had in mind. Thank you anyway. Q: Why did...
A.
It was too small.
B.
It was too loose.
C.
It was too expensive.
D.
She doesn't like the style.
查看完整题目与答案
【简答题】通过一年的学习，我们能用学到的化学知识解决许多问题： （1）衣服上的油污可以用汽油洗净，其原理是______； 也可以用加了洗涤剂的水洗净，其原理是______． （2）胃酸过多的病人，常服用含有氢氧化镁的药物以减轻病痛，其反应的化学方程式 为______． （3）若发生重金属离子中毒，可以用来解毒的食物是______． （4）使溶解在水中的空气逸出可以采用______减小气体溶解度的方法．
查看完整题目与答案
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