下列有关溶液性质的说法中错误的是

【名词&注释】

二氧化碳、制冷剂(refrigerant)、人工降雨(artificial rainfall)、食盐水(salt water)

[单选题]下列有关溶液性质的说法中错误的是

A. 煮沸的咸汤比煮沸的水温度高
B. 溶液一定是无色透明的
C. 食盐水^{(salt water)}能导电是因为食盐水^{(salt water)}中含有较多自由移动的离子
D. 消除路面上的积雪可以撒些盐，使冰雪较快融化

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学习资料：

[单选题]AThe word "hobby is an interesting word Every person has one thing he or she likes to do for fun Some people like to collect things like stamps or storybooks． Others like to play football or go window shopping where you can look at many beautiful things without buying them．

A. Sometimes I play golf with my sons and play tennis with all the families． I like to collect music books． I also collect musical instruments(乐器) from China like the erhu，the dizi，the xiao，the suona，and the pipa． These are the instruments of China which can't be found in America．
B. l like to go and see my brother in the state(州) of Alaska where fishing is wonderful． The two of us take a boat and go to a small river where we fish for salmon． America has the most famous fish．
C. The word "hobby means________
D. collecting stamps
E. playing tennis with your friends
F. something you enjoy doing
G. something you can see at the window shopping

[单选题]3.—Mr Zhang，I'm not feeling well． I-d like to have this afternoon _________ to go to a doctor．—OK．

A. on
B. off
C. down
D. up

[单选题]下列关于二氧化碳的说法正确的是（ ）

①二氧化碳有毒，不能供给呼吸 ②将二氧化碳通入紫色石蕊试液，紫色石蕊试液会变红 ③二氧化碳可用于制汽水 ④二氧化碳气体可作制冷剂 ⑤干冰可用于人工降雨 ⑥二氧化碳既可以用排水集气法收集，又可以用向上排空气集气法收集

A. ②③④⑤ ①②④⑥ ③⑤⑥ ②③⑤

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