题目

将盐酸滴到碳酸钠粉末上，能使反应的最初速率加快的是(    ) A.盐酸浓度不变，使用量增大一倍            B.盐酸浓度增加一倍，用量减至 C.增大Na2CO3粉末的量                       D.使反应在较高温度下进行 答案：解析：Na2CO3粉末为固体，改变固体的量不影响反应速率，需要改变浓度或改变其他条件。答案：BD任务型阅读MaryI never lose things, but I often forget the places where I put them. For example, I need to post a letter, so I look for the stamps I bought. I never lose things, but I often forget the places where I put them. （A） I spend at least ten minutes looking for my handbag every morning. But I always find it in a stupid place, so I am very angry.MikeI am usually very careful with my things. (B) However, there are some things which I can't keep umbrellas, for example.I buy two umbrellas every year. I put them in shops, restaurants or in the cinema and I forget them. When I go back to get them, they're never there. Now I always buy very cheap umbrellas！JackLast month I left my bag at the supermarket. Luckily, they phoned me and I went back to get it. Another thing I often lose is my car keys.(C) Last week I lost them, so I took the bus to work.When I got home, I found them in the rubbish bin!将文中画线的(A)句和(B)句分别翻译成汉语。【1】(A) _______________________________________________________________________【2】(B) _______________________________________________________________________把文中画线的(C)句进行同义句转换。【3】Last week I ________ ________ them, so I went to work ________ ________. 根据文章内容回答问题。【4】Why is Mary angry every morning?________________________________________________________________________【5】Where did Jack find his car keys last week?________________________________________________________________________