问题
选择题
进行化学实验必须注意安全，下列说法不正确遥是 [ ]
A.不慎将酸溅到眼中，应立即用水冲洗，边洗边眨眼睛
B.不慎将碱溶液沾到皮肤上，要立即用大量水冲洗，然后涂上硼酸溶液
C.如果苯酚浓溶液沾到皮肤上，应立即用酒精洗
D.配制硫酸溶液时，可先在量筒中加入一定体积的水，再在搅拌下慢慢加入浓硫酸
答案
答案：D
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进行化学实验必须注意安全，下列说法不正确遥是 [ ]
A.不慎将酸溅到眼中，应立即用水冲洗，边洗边眨眼睛
B.不慎将碱溶液沾到皮肤上，要立即用大量水冲洗，然后涂上硼酸溶液
C.如果苯酚浓溶液沾到皮肤上，应立即用酒精洗
D.配制硫酸溶液时，可先在量筒中加入一定体积的水，再在搅拌下慢慢加入浓硫酸
答案：D
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| IF and WHEN often had lunch together. Their conversation always 1 on the things they hoped to achieve and they loved to talk about them. This particular Saturday when they met for lunch, WHEN 2 IF wasn't in a great mood (心情). After they sat at the usual table 3 for them, WHEN asked IF, "You don't seem your usual 4 self?" IF replied, "Yesterday I saw a course I wanted to take. If only I 5 the time." WHEN knew exactly how IF felt and said, "I too saw a 6 and I' m going to register when I get 7 money." WHEN then questioned IF, "What about the new job you were going to apply for?" IF answered, "I would have applied, but my 8 broke down. I couldn't type my resume (简历)." "Don't worry. I've been thinking about looking for another job also, 9 I'll wait and when the weather gets 10 I will look then. I hate this awful weather." The man sitting nearby heard them talking about when this and if that. When he couldn't 11 it anymore, he went to them and said, "I think I know 12 you could solve your problems." IF smiled and thought that even if he knew the 13 they faced, there was no way he could help! 14 , IF asked the man for advice. The man said, "Your conversation reminds me of an old 15 : IF and WHEN were planted, and nothing 16 ." IF and WHEN both looked surprised and began to feel 17 of living their life for the "ifs" and "whens". Finally they came to a(n) 18 : next time they met, there would be no"ifs" or "whens"; they would 19 talk about what they had 20 ! | ||||
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