下列各句没有语病的一项是_刷题宝

题干

下列各句没有语病的一项是（）

A：各种读书声汇成一支动听的乐曲。

B：我国的人口是世界最多的国家。

C：汽车突然渐渐地停了下来。

D：对这种社会现象，在我们已经是司空见惯了。

上一题下一题 0.0难度选择题更新时间:2019-08-11 11:26:42

答案(点此获取答案解析）

A

同类题1

设n为正整数，集合A=

{α | α = (t_{1} ， t_{2} \dots t_{n}), t_{k} \in {0, 1}, k = 1, 2, \dots, n}

,对于集合A中的任意元素

α =

{x_{1} ， x_{2} \dots x_{n}}

β

{y_{1} ， y_{2} \dots y_{n}}

M（ $α, β$ ）= $\frac{1}{2}$ ( $x_{1} + y_{1} - | x_{1} - y_{1} |$ )+（ $x_{2} + y_{2} - | x_{2} - y_{2} |$ ）+ +（ $x_{n} + y_{n} - | x_{n} - y_{n} |$ ）

(Ⅰ)当n=3时，若 $α = (1, 1, 0)$ ， $β =$ （0,1,1），求M（ $α, α$ ）和M（ $α, β$ ）的值；

(Ⅱ)当n=4时，设B是A的子集，且满足；对于B中的任意元素 $α, β$ ,当a，β相同时,M( $α, β$ )是奇数;当aβ不同时,M( $α, β$ )是偶数,求集合B中元素个数的最大值

(Ⅲ)给定不小于2的n，设B是A的子集，且满足；对于B中的任意两个不同的元素 $α, β$ ,M( $α, β$ )=0,写出一个集合B,使其元素个数最多,并说明理由.

同类题2

下表是我国环境与人口信息表．读表完成下题．

我国环境与人口信息
最多能供养的人口数量		①约16亿人
最适宜的人口数量	温饱型消费水平	②10亿内
	小康型消费水平	③8亿﹣9亿人
	富裕型消费水平	④7亿内

同类题3

根据短文内容, 选择正确答案。

Michelle, a famous lady, has found that more than 25％ students are too fat in her country. It is a very serious problem. So she starts a health program to deal with it. The health program is to reduce the amount of fat students today and in the future.

The program will get families, schools, newspapers, magazines and TVs to join together and deal with the students' obesity. So that students will be at a healthier weight. The program includes: Food stores should sell healthier foods. Schools should serve healthier meals with less fat and should also offer gym classes.

The lady is trying to fight the students' obesity all over the country because it can cause illnesses and higher health cost. She wants the students to eat right, exercise more and control their weight. At the same time she has also set a good example by planting a vegetable garden. She hopes that the garden will encourage more people to plant one too.

The health program is really helpful to the students today and in the future. As she says, we cannot always build the future for youth, but we can build our youth for the future.

同类题4

被除数＝____×____＋____ (指有余数除法)

同类题5

如图，用12块相同的小长方形瓷砖拼成一个大的长方形，则每个小长方形瓷砖的面积是（　　）

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