低压消防泵扬程不大于()MPa。A.1.0 B.1.4 C.1.6 D.2.2

题型:单项选择题

问题:

低压消防泵扬程不大于()MPa。

A.1.0

B.1.4

C.1.6

D.2.2

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题型:单项选择题

单词拼写(每小题1分,共10分)

56. Hearing the 2009 World Winter University Games______(宣布) open, all the people in the Harbin Sports Center Gym burst into cheers.

57. The well-known singer was ________ (伴奏)at the piano by Mr Wang.

58. If you want to get the job, you have to speak _____(坚定地)and bravely to the boss to make him believe in you.

59. Finally, after years of unhappy marriage, Lucy got _______(离婚).

60. The teacher smiled with________ (满意)at the progress of his students.

61. Mr. White gets up early and runs every day, which he thinks is b______ to his health.

62. They say such ill things about you out of e______.

63. This species has a________ well to winter climates.

64. I feel much s________ for those homeless people on the street.

65. Don’t waste p________ time talking to him. He is not worth it.

题型:单项选择题

如图所示,小球从竖直砖墙某位置静止释放,用频闪照相机在同一底片上多次曝光,得到了图中1、2、3、4、5…所示小球运动过程中每次曝光的位置,连续两次曝光的时间间隔均为T,每块砖的厚度为d.根据图中的信息,下列判断正确的是(  )

A.位置“1”是小球释放的初始位置

B.小球做匀加速直线运动

C.小球下落的加速度为4

d
T2

D.小球在位置“3”的速度为

7d
2T

题型:单项选择题

2009年全国法院审结的各类案件中,办理的执行案件数排在()。

A.第一位

B.第二位

C.第三位

D.第四位

题型:单项选择题

GB6675-2003规定玩具箱是指封闭体积大于(),预订设计用于储存玩具的有铰链盖的容器。

A.0.03m3

B.0.04m3

C.0.05m3

D.0.06m3

题型:单项选择题

A=Am×n,R(A)=r,b为m维列向量,则有______。

A.当r=m时,方程组Ax=b有解
B.当r=n时,方程组Ax=b有唯一解
C.当m=n时,方程组Ax=b有唯一解
D.当r<n时,方程组Ax=b有无穷多解

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