18. 6 There was a big hole in the road which ________ the traffic. A. set back B. stood back C. held up D. kept down ...

9. 7 Many a delegate was in favor of his proposal that a special committee ________ to investigate the incident. A. were set up B. was set up C. be set up D. set up ...

2. 9. Their products are frequently overpriced and ______ in quality. A. influential B. inferior C. superior D. subordinate ...

14. 20. Jack wishes that he _______ business instead of history when he was in university. A. studied B. study C. had been studying D. had studied ...

4. 15. That young man still denies _______ the fire behind the store. A. start B. to start C. having started D. to have started ...

1. 关于温度的意义，有下列几种说法： (1) 气体的温度是分子热运动平均平动动能的量度. (2) 气体的温度是大量气体分子热运动的集体表现，具有统计意义. (3) 温度的高低反映物质内部分子热运动剧烈程度的不同. (4) 从微观上看，气体的温度表示每个气体分子...

7. 一个点电荷放在球形高斯面的球心处，讨论下列情况下电通量的变化情况： （1）用一个和此球形高斯面相切的正立方体表面来代替球形高斯面。 （2）点电荷离开球心但还在球面内。 （3）有另一个电荷放在球面外。 （4）有另一电荷放在球面内。 ...

7. 双原子分子理想气体的初始温度为T，初始体积为V。气体取三个可逆过程构成一个循环：① 绝热膨胀到体积2V；② 等体过程到温度T；③ 等温压缩回到初始体积V。 A. 在每个过程中，气体的熵不变 B. 在每个过程中，外界的熵不变 C. 在每个过程中，气体和外界...

7. 在1:5000地形图上求得1.5cm长的直线两端点的高程为418.3m和416.8m，则该直线的地面坡度为2%。（ ） A. 错误 B. 正确 ...

10. 粘土砖砌筑前，要浇水湿润，含水率宜为 %。 A. 2-5 B. 5-10 C. 10-15 D. 15-20 ...