单项选择题

在编制材料消耗定额的基本方法中，（　　）比较适合计算块状、板状、卷状等材料的消耗量。

A.现场技术测定法
B.试验法
C.统计法
D.理论计算法

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单项选择题

在正常施工条件和合理使用材料的情况下，生产质量合格的单位产品所必须消耗的建筑安装材料的数量标准属于（）。

A.材料消耗定额
B.机械台班消耗定额
C.施工定额
D.概算定额

未分类题

It was Ann' s first experience of flying. She had always been afraid of heights and so was pre pared to be frighteneD.Only the fact that she was going to meet her son who she had not seen for three years had given her the courage to make the flight.She sat in her seat, her hands gripping its arms, her seat belt already fasteneD.The air hostess was talking, telling everyone what to do in case of emergency, showing them where their .life-jackets werE.The plane was crowded, every seat was full. From her window seat, getting out in a hurry would be impossible, thought Ann. In any case who would want to get out of a plane in mid-air?The engines began to shake--the noise increased till it was like a great rushing winD.She looked out to see the runway slip past at astonishing speeD.She wanted to cry out--to stop the plane before it left the ground, but she knew she was trapped in this great roaring machinE.I must scream, she told herself, and put her hands over her eyes.There was a strange feeling as if she were going up in a lift. The noise died down. Carefully she opened her eyes. Through the window she saw a great carpet of cloud above, so beautiful that she stared in wonder, hardly turning away from the window till they touched down.Ann thought she would be frightened because ______.A.she had never flown beforeB.she had a fear of being in high placesC.she hadn' t made proper preparations.D.she was naturally timid

A.B.life-jackets
C.
D.
Ann
E.
A.she
F.she
G.she
H.
D.she

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