质量均为m g的薄锌片和薄铁片分别和100g溶质质量分数均为9.8%的两份稀硫酸反应，反应情况如图所示．请回答有关问题：
（1）图1中的a代表_________（填“锌”或“铁”）与硫酸的反应，反应速率快的原因是
_________．若要使b线向a线靠拢，可以采取的措施是_________（填写一种方法）．
（2）图1的情况可能是_________，图2的情况可能_________
A．铁和锌均过量，酸不足
B．铁正好完全反应，锌过量
C．锌和铁都没有剩余，酸过量
D．锌和铁都有剩余，且剩余固体质量相等
（3）满足图1情况的m的取值范围是_________，满足图2的m取值范围是_________．
（1）锌；锌的金属活动性（活泼性）比铁强；将铁片换成铁粉（或适当加热）（如写成铁片搅拌或增大盐酸浓度，不能得分）；
（2）A；C；
（3）m≥6.5；m＜6.5．
IF and WHEN often had lunch together. Their conversation always 36 on the things they hoped to achieve and they loved to talk about them. ] This particular Saturday when they met for lunch, WHEN 37 IF wasn’t in a great mood（心情）. After they sat at the usual table 38 for them, WHEN asked IF, “You don’t seem your usual 39 self(样子)?” IF replied,“Yesterday I saw a course I wanted to take. If only I 40 the time.” WHEN knew exactly how IF felt and said, “I too saw a 41 and I’ m going to register when I get 42 money.” WHEN then questioned IF, “What about the new job you were going to apply for?” IF answered, “I would have applied, but my 43 broke down. I couldn’t type my resume(简历).” “Don’t worry. I’ve been thinking about looking for another job also, 44 I’ll wait and when the weather gets 45 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 46 it anymore, he went to them and said, “I think I know 47 you could solve your problems.” IF smiled and thought that even if he knew the 48 they faced, there was no way he could help! 49 , IF asked the man for advice. The man said, “Your conversation reminds me of an old 50 : IF and WHEN were planted, and nothing 51 .” IF and WHEN both looked surprised and began to feel 52 of living their life for the “ifs” and “whens”. Finally they came to a(n) 53 : next time they met, there would be no “ifs” or “whens”; they would 54 talk about what they had 55 !
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