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问题 解答题
对于任意的有理数a、b、c、d，我们规定
.
ab
cd
.
=ad-bc．
如：
.
(-2)(-4)
35
.
=（-2）×5-（-4）×3=2．根据这一规定，解答下列问题：
（1）化简
.
(x+3y)2x
3y(2x+y)
.
；
（2）若x、y同时满足
.
3(-2)
yx
.
=5，
.
x1
y2
.
=8，求x、y的值．
答案

（1）原式=（x+3y）（2x+y）-2x•3y=2x2+xy+3y2；

（2）根据题意，满足

.
3(-2)
yx
.
=5，可化为3x+2y=5；

.
x1
y2
.
=8，可化为2x-y=8；

即可得

3x+2y=5
2x-y=8
，

解得

x=3
y=-2
．

阅读理解

根据短文回答问题。

　　Wang Tao is a young worker . He works in a big company ( 公司).He gets

up at twenty past six every morning .He often has breakfast at seven o'clock .And

then he goes to the company by bus . He begins to clean the machines (机器)

when he gets to the company. Wang Tao goes home at four thirty . When he gets

home,he usually does the housework first .After supper ,he reads books.

Sometimes he tells his father and mother something about his company.

Sometimes he watches TV with them . He goes to bed at about ten o'clock.

1. Wang Tao is _____

2. Wang Tao gets to the company and _____.

3. After he gets home ,he usually _____ first .

4. After supper, _____, sometimes he tells his parents something about his

company .

5. Wang Tao lives with _____.
查看答案
选择题

望子成龙是天下父母的共同心愿。子女与父母的冲突往往基于( )

A．父母对子女的高期待、严要求

B．父母的思想太落后

C．子女不争气

D．父母的文化水平不高
查看答案