若按功能划分，软件测试的方法通常分为白盒测试方法和______测试方法。

设A是三阶矩阵，λ₁，λ₂，λ₃是A的三个不同的特征值，对应的特征向量分别是ξ₁，ξ₂，ξ₃，令β=ξ₁+ξ₂+ξ₃．

证明β不是A的特征向量；

下列因素中，不属于影响资金等值的是（）。

A.资金数额的大小

B.资金发生时间的早晚

C.收益率

D.风险价值

家庭制作酸奶：请按下列步骤进行：

(1)新鲜的全脂或脱脂乳和糖混合（如将250克鲜奶中加入两匙白糖）→(2)热处理（煮沸）→(3)冷却(42～43℃)→(4)加入一些购买的酸奶→(5)发酵（放在室内温暖的地方数小时，如夏季可放在室温下，冬季可放在取暖设施附近；容器要事先消毒灭菌，发酵时要将盖密封）→(6)冷藏或食用。制作酸奶时，对材料热处理（煮沸）的目的是：加入一些购买的酸奶的目的是：____________________。发酵时要将盖密封的原因是：____________________。产生酸味的原理是：____________________。

词与词之间的关系有以下九种，仔细分辨下列各种关系所举的例子，不正确的是[ ]

A、先后顺序关系    秋：冬

B、大小顺序关系    伯伯：叔叔

C、大类小类关系    蔬菜：白菜 

D、整体、局部关系  树：小树 

E、事物和场所关系  飞机：天空 

F、事物和特征关系  夏天：炎热 

G、事物和作用关系  钢笔：写字 

H、人物和对象关系  医生：病人 

I、事物和对象关系  书包：书

Children like to imagine they are someone else in a game. As a parent you might never guess how it can benefit your child. It helps your child：

Develop Social Skills

As children play pretend games，they explore relationships between family members，friends and co­workers and learn more about how people interact.Playing doctors，they imagine how physicians care for their patients.Imaginative play helps develop empathy(移情) with others.If children can imagine how it feels to be left out of a game or to lose a pet，they are better able to help those in need.They become more willing to play fair，to share，and to cooperate.

Build Self­confidence

Young children have very little control over their lives.Imagining oneself as a builder of skyscrapers or a super hero defending the planet is inspiring to children.It helps them develop confidence in their abilities and their potential.

Promote Intellectual Growth

Using imagination is the beginning of abstract thought.Children who can see a king's castle in a mound of sand or a delicious dinner in a mud pie are learning to think symbolically.This skill is important in school where a child will have to learn that numbers symbolize groups of objects，letters symbolize sounds，and so on.

Practice Language Skills

Kids who pretend with their friends do a lot of talking.This helps increase their vocabulary，improve sentence structure and develop communication skills.

Get Rid of Fears

Pretending can help children get rid of their fears and worries.When children role­play the big，bad monster under the bed，they gain a sense of control over him and he doesn't seem quite so big or so bad.

小题1:Which of the following can help children develop social skills in a game?

A．Pretending to be a super hero.

B．Preparing a delicious dinner with mud.

C．Helping a doctor to attend patients.

D．Pretending to be a doctor.小题2:Why can imagination build children's self­confidence?

A．It makes them feel as if they were much more powerful than they really are.

B．It helps them protect people and make much greater progress.

C．It helps them gain control over themselves.

D．It makes them more willing to play fair.小题3:Which of the following is NOT true according to the article?

A．While playing pretend games，children learn to get along with others.

B．Playing pretend games helps children to do well while they are in school.

C．Playing pretend games only helps children psychologically.

D．Playing pretend games is good for children's development.小题4:The best title for this passage probably is________.

A．Benefits of Playing Pretend Games

B．Tips on How to Improve Your Children's Imagination

C．Advantages of Playing Outdoors

D．Skills in Playing Pretend Games