如果x1、x2是方程2x2-3x-1=0的两个根，那么x1+x2的值是（） A．

搜题请搜索小程序“爱下问搜题”

问题选择题

如果x₁、x₂是方程2x²-3x-1=0的两个根，那么x₁+x₂的值是（　　）

A．-3

B．3

C．-

D．

答案

∵x₁、x₂是方程2x²-3x-1=0的两个实数根，

∴x₁+x₂=

，故选D．

完形填空

三、Rewrite the following sentences(句型转换)5分

1.To drink too much wine is not a good habit.

_________ _________ not a good habit _________ _________ too much wine.

2.People keep deer in order to get meat and fur.

The deer _________ _________ _________ their meat and fur.

3.Farmers send the deer meat and fur to all over the world by ship.

The deer meat and fur _________ _________ _________ all over the world.

4.Most people in Australia speak English.

_________ _________ _________ _________ in Australia speak English.

5.There are 6% of Asians who have settled in New Zealand.

Asians _________ _________ about 6% of _________ _________ in New Zealand.

多项选择题

下列哪些属于改善患者自知力的训练（）

A.提高醒觉能力的训练

B.定向能力训练

C.改善患者对自身缺陷的察觉

D.改善患者的感知功能

E.改善患者对现存缺陷和远期目标之间差距的认识