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问题 多项选择题

进行普通混凝土拌合物性能试验时的试样制备，下列说法正确的是（）。

A.拌合时试验室的温度应保持在20±5℃，所用材料的温度应与试验室温度保持一致

B.材料用量应以质量计。称量精度：骨料为±1%水、水泥、掺合料、外加剂均为±0.5%

C.混凝土拌合物的制备应符合《普通混凝土配合比设计规程》JGJ55中的有关规定

D.从试样制备完毕到开始做各项性能试验不宜超过5min

答案

参考答案：A, B, C, D

阅读理解

阅读理解。

     It is the first day of October today. It is my grandmother's birthday. Father, mother, sister and  I go to

 see her.

     First we go to a supermarket to buy some presents for my grandmother. My father buys a big cake (蛋

 糕). My mother buys a red sweater. My sister buys a green T-shirt.I buy a black hat for my grandmother.

 We go to my grandmother's home in my father's car. We get there at around nine o'clock. My

 grandmother is very happy to see us. We give these presents to her and say to her, "Happy birthday to

 you!,'My grandmother is very glad (高兴的).Then my sister and I sit down and play games with my

 grandmother. After dinner we say goodbye to her and go back (回) home. We are very happy today.

1.  My grandmother's birthday is _____.

    A. October thirty-first    

    B. October first

    C. October second    

    D. October third

2. My mother buys-for my grandmother.

    A.  a black hat    

    B.  a big cake    

    C.  a blue sweater    

    D.  a red sweater

3. We go _____ to buy some presents.

    A.  a clothes store    

    B.  a supermarket    

    C.  afruit shop    

    D.  a book store

4.  My grandmother is very _____ to see us.

    A. old    

    B. unhappy (不高兴)

    C. happy    

    D. boring

5. My sister and I play games with my _____.

    A. mother    

    B. uncle    

    C. grandmother    

    D. father
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单项选择题

《传染病防治法》第二十一条规定，卫生防疫机构在接到某些传染病疫情报告后，应立即报告当地卫生行政部门，当地卫生行政部门应立即报告当地政府和上级卫生行政部门及国务院卫生行政部门。下 * * 组疾病中，哪一组是符合规定的（）

A.霍乱、鼠疫、肺炭疽、黑热病

B.霍乱、鼠疫、肺炭疽、艾滋病

C.霍乱、鼠疫、肺炭疽、登革热

D.霍乱、鼠疫、艾滋病、布氏杆菌病
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