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保险丝允许通过的最大电流为5 A，则在正常使用时，用电器的最大总功率为w(电压为 220 V)．在此功率下使用3小时，消耗的电能为kW·h．

A.在此功率下使用3小时，消耗的电能为__________kW·h．

【参考答案】

1100(3分) 3．3(3分)

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气—固相催化反应的内扩散模数的大小可判别内扩散的影响程度，内扩散模数愈小，内外浓度愈近于()

A、愈大
B、愈小
C、不变
D、愈均一

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Part B (10 points)You are going to read a text about different types of friendship, followed by a list of examples. Choose the best example from the list for each numbered subheading.I was thinking about how everybody can't be everything to each other, but some people can be something to each other, thank God, from the ones whose shoulder you cry on to the ones whose half slips you borrow to the nameless ones you chat with in the grocery line.(41) Buddies:They are the workhorses of the friendship world. They are the people out there on the front lines, defending you from loneliness and boredom.(42) Working Friend:Then there is that special guy at work. Like all the other people at the job site al first he's just part of the scenery. But gradually he starts to stand out from the crowd.(43) A Faraway FriendHe she is someone you grew up with or went to school with or lived in the same town as until one of you moved away.(44) The Former Friend:

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