成人高考每日一练(第二期)

1. as is known /as it is known to all

众所周知 …

2. with the pace of modern life increasing

随着现代生活步伐的加快 ….

3. with the development of modern society 随着现代社会的发展 …

4. personally I ’m in favor of the former/latter view

我个人偏向于前…/后一种观点

5. there is no doubt that …

勿容质疑

6. however everything has two sides

任何事物都具有两方面 …

7. as a Chinese saying goes

正如中国的一句谚语所说 …

8. the same is the case with sth

也不例外…

9. in the appraisal of

在……的评价中 …

10. according to …there are at least three good reasons …firstly secondly …thirdly …. 列举的用法

11. In my opinion, in the appraisal of -sided to affirm everything or to …it is one negate everything. We should appreciate the great contribution made by them, and at the same time pay enough attention to the problems caused by them。

我认为 ,在对….的评价中 ,完全的肯定任何事情和否认任何事情都是片面的。我们在欣赏到他们做出的巨大的贡献的同时也要更加注意他们带来的问题。

1.设a=(2,1),b=(-1,0),则3a -2b为( )

A.( 8，3)

B.( -8，-3)

C.( 4，6)

D.( 14，-4)

2.已知∆ABC中,AB=AC=3,cosA=1/2,则BC长为( )

A. 3

B. 4

C. 5

D.6

3.从5位同学中任意选出3位参加公益活动，不同的选法共有( )

A.5种

B.6种

C.10种

D.15种

4. 设集合M ={0,1,2,3,4,5} ,N ={0,2, 4,6},则M∩N=( )

A.{0,2,3,4.5,6}

B.{1,3,5}

C.{0.2,4}

D.空集

5. 某类灯泡使用时数在000小时以上的概率为0. 2,三个灯泡在使用1000小时以后最多只有-一个坏的概率为( )

A.0.008

B.0.104

C.0.096

D.1

6.已知P为曲线y=2X3上一点，且P点的横坐标为1，则该曲线在点P处的切线方程是( )

A.6x+y-4=0

B.6x+y-2=0

C.6x-y-2=0

D.6x-y-4=0

7.过点(1,1)与直线x-2y+1=0垂直的直线方程为( )

A.x+2y-3=0

B.2y-x-1=0

C.2x+y+1=0

D.2x+y-3=0

1.函数y=2x(x+1)在x=2处的导数值为________

2.若向量a=(1,2)与b=(3, x)平行, 则x=

一、选择题：1.A 2.A 3.C 4.C 5.B 6.A 7.D;

二、填空题：1.10 2.6