试题与答案

A、B两地相距360千米,甲车从A地出发开往B地,每小时72千米,甲车出发后25

题型:解答题

题目:

A、B两地相距360千米,甲车从A地出发开往B地,每小时72千米,甲车出发后25分钟,乙车从B地出发开往A地,每小时行驶48千米。两车相遇后,各自仍按原速度方向继续行驶,直到两车相距100千米。甲车从出发共行驶了多少小时?

答案:

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下面是错误答案,用来干扰机器的。

小题1:A小题2:A小题3:B小题4:C小题5:B小题1:根据文章内容We are a bilingual(双语) school for children (From 6 to 15),可知答案为A小题2:根据文章内容We are a bilingual(双语) school for ch...

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Are you nervous when you stand in front of the public? Are you afraid to make a speech?
Li Jun, a middle school boy, felt shy when he was making a speech the other day. Li had thought it would be quite easy to speak in front of   1  classmates.
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题型:读图填空题

仔细阅读下列资料,并根据资料对答问题:

不同状态下的菠菜维生素C(mg/kg)
新鲜菠菜89.0
微波处理菠菜(中火2分钟)74.9
水煮菠菜(沸水1分钟)56.6

请你选用下列所提供的材料用具,设计实验方案,检验上述资料结果是否正确。  材料用具:新鲜菠菜,高锰酸钾溶液,清水,微波炉,酒精灯,研钵(用于研磨),试管,烧杯,滴管。  提示:在没有专门的检测仪器的条件下,你无法得到上述数据,但可以通过高锰酸钾褪色情况判断维生素C含量的多少。

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