问题
选择题
图1所示实验室制取二氧化碳操作中错误的是
答案
答案：D
题目分析：二氧化碳的验满，需将燃着的木条伸到集气瓶口，观察木条是否熄灭，而不能伸入集气瓶内，D错误，故选D。
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图1所示实验室制取二氧化碳操作中错误的是
答案：D
题目分析：二氧化碳的验满，需将燃着的木条伸到集气瓶口，观察木条是否熄灭，而不能伸入集气瓶内，D错误，故选D。
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| Everyone may fail or may meet with difficulties. When a person meets difficulties, he should take a 1 attitude (态度) to them. In fact many people fall 2 they fail once. They regard themselves as failures (失败的人), and are not able to get over the difficulties. 3 people, however, are able to take a correct attitude. They face up to the failure. They try to 4 what trouble they have. At last, they get over the difficulties. They have got the right attitude to deal with the difficulties. "Do not ever lose your heart (心)." This is the advice given by a 5 young man. This young man once got hurt 6 his leg. He could never again stand up like other people. This is a misfortune (不幸的故事). He didn't lose heart. At last he found out that he could do something 7 as other people. He started to do research on computer. He 8 succeeded in becoming an expert (专家) on computer. The story tells us not to lose heart whatever happens. The difficulties are nothing if you take courage and have confidence in 9 . Let's learn something from the story. Keep on going, 10 you will make it. Remember: There is no difficulty if you put your heart into it!
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