题目内容
【题目】下表记录了物质X的溶液分别加入到另外三种物质的溶液中产生的现象。则物质X的化学式可能是( )。
物质
氢氧化钠
碳酸钠
石蕊
现象
无明显现象
产生气泡
溶液变红
A.Ca(OH)2 B．CuSO4 C．HCl D．KCl
【答案】C
【解析】
试题分析：用代入法可知X为盐酸。
【题目】空气的主要成分①氧气、②氮气、③稀有气体、④二氧化碳及其他气体杂质，按体积分数由大到小的顺序排列正确的是( )。
A. ①②③④ B. ②①③④
C. ①②④③ D. ②①④③
【题目】—Mom, I must go now. Peter is waiting for me at the cinema.
—OK! __________.
A. Good idea B. Good luck
C. Have a good time D. Best wishes
【题目】C
It is Sunday afternoon. Mary goes to do the shopping with her mother. Her mother wants to buy some food for supper. Mary wants to buy a new skirt and some school things. They come to a shop.
＂What does your shop sell?＂ Mary asks. ＂A lot of things.＂ The girl in the shop says. ＂You can buy food, drinks, clothes in our shop and school things, too.＂
Mary and her mother go in. There are many people in the shop. Mary finds a nice white skirt.
＂How much is the skirt?＂ Mary asks the girl in the shop.
＂It’s eighty yuan.＂
＂That’s too dear. Can I find a cheap one?＂
＂What about the green one? It looks nice. And it’s only thirty yuan.＂
＂OK, thanks a lot.＂
＂You are welcome.＂
After that, Mary buys some school things, too. Here mother buys a lot of food, like bread, cakes, meat and fish. They get home very late.
【1】Mary wants to buy a new skirt and _________.
A. some food B. some drinks
C. some clothes D. some school things
【2】Mary goes to do the shopping with her mother on ________.
A. Saturday afternoon B. Saturday morning
C. Sunday morning D. Sunday afternoon
【3】Mary buys a _________ skirt.
A. white B. green C. red D. dear
【4】The white skirt is __________.
A. ￥30 B. ￥110 C. ￥80 D. ￥100
【5】 The green skirt is ___________.
A. nice but dear B. nice and cheap
not nice but cheap D. not nice or cheap
【题目】下列加速溶解的措施中，能改变固体溶解度的是( )。
A．把固体研细 B．加热
C．搅拌 D．振荡
【题目】—I want some apples.
—OK. __________.
A. Here it is B. Here you are
C. Give you D. You’re welcome
【题目】 —What do you expect __________ from your hard work?
—Nothing, I just want to try my best.
A. get B. got C. getting D. to get
【题目】下列防锈措施合理的是（ ）
A．经常用水冲洗自行车链条
B．在铁制暖气片上刷“银粉”
C．用“钢丝球”打磨铝锅表面
D．用过的菜刀及时用盐水清洗
【题目】配制溶液时，下列溶剂中最常用的是( )
A.酒精 B.水 C.汽油 D.植物油
