问题 选择题

下列关于硝酸铵晶体溶于水的说法中错误的是(  )

A.所得液体凝固点比蒸馏水低

B.所得液体沸点比蒸馏水高

C.所得液体各处质量分数相同

D.溶解过程中液体温度升高

答案

A、硝酸铵溶解时,吸收热量,使溶液温度降低,能使盛硝酸铵溶液的杯底结冰; 正确;

B、硝酸铵溶液的沸点比水的沸点高; 正确;

C、硝酸铵溶具备溶液的特点,即均一、稳定的混合物,所以其各处的质量分数相同; 正确;

D、硝酸铵溶解时,吸收热量,使溶液温度降低;不正确.

故选D

阅读理解

Dear Tom,

        How time flies! Thank you for your Christmas cards. My parents and I felt excited for  your greetings.I really missed you !  I still remember I went skiing with you in Lianhua Hill.We talked a lot about our friends, plans of trips and other things.  On the way back, you invited me to your country Canada, but I refused it because I was really busy then. Last week, I joined in a seven-day-trip to Canada.  My mother asked me to bring some delicious food to  you.  But I lost your address and phone number at the airport in Canada,  so I could not contact (联系) you.  At last, I left the food in my aunt's home.  Her family address is 433 Park Road Ottawa.  You can also call 010-2002 at any time. I miss you.

                                                                                                                                                Loves.

                                                                                                                                                 LiHua

1. The underlined word "refused" means "______ " in Chinese.

A. 接受

B. 归还

C. 赠予

D. 拒绝

2. Where does Tom come from according to the passage?

A. Canada.

B. The United States.

C. China.

D. We don't know.

3.Li Hua lost Tom's address and telephone number______ .

A. at the airport in Canada

B. at the airport in China

C. in Lianhua Hill

D. at her home

4. Why did Li Hua visit Canada?

A. She studied in Canada.

B. She joined in a seven days trip,

C. She visited her aunt.

D. She had a meeting in Canada,

5. What can we know from the passage?

A.Li Hua contactedTom with the help of her aunt.

B. Li Hua's mother asked Li Hua to bring Tom a coat.

C. Tom's address is 433 Park Road Ottawa.

D. The phone number 010-2002 is Li Hua's aunt's.

选择题