正方形的对角线长为22cm，则它的周长为______cm，面积为______cm

Homework should be done as soon as you get home from school. If you have after-school activities, the homework should be done first. At the same time, it is fine to allow（允许）for a snack break and also to allow for stretching(拉伸的)breaks.

Also, you should remember that it is your duty to do your homework. Next time, when you want to depend on(依靠) Mom and Dad for help, please try to find the answer yourself, because you will learn much, much more that way.

When you have a question, especially something about a science or math, don’t always turn to your teacher! It is a good idea to try to find the answer yourself. If this doesn’t work, you can also look at the materials in the back of the book. They may guide you to the pages you should look at to help you understand the problem.

Finally, while doing homework, don’t think about or do other things. Keep working. Setting a time limit(限制) often helps with this. Different ages decide different amounts of time. 10-15 minutes is good for a child that’s aged 6-8. A time of 20-30 minutes is about right for a child aged 9-12. Kids can keep studying for 30-45 minutes from the ages of 13 to 15. This, of course, depends on your abilities to pay attention and stay on tasks.

小题1:In the first paragraph, the writer mainly tells us that ______.

A．doing homework is the first thing you should do at home

B．after-school activities can’t affect doing homework

C．parents can help kids with their homework at night

D．kids need a good rest after school小题2:In the third paragraph,   the writer wants to tell us that ______.

A．students should ask the teacher more questions

B．thinking over the questions before asking others is important

C．problems can’t be solved without a teacher’s help

D．students shouldn’t always look at the materials in the back of the book小题3:The passage mainly tells children ______.

A．not to look away while doing homework

B．to do homework by themselves

C．not to turn to teachers when doing homework

D．to do their homework quickly and in the right way’

患者头痛眩晕，甚则欲仆，胸闷呕恶，苔白腻，脉弦滑。治宜用（）

A.镇肝熄风汤

B.川芎茶调散

C.龙胆泻肝汤

D.半夏白术天麻汤

E.补中益气汤

数据字典应在（）阶段建立。

A.前期规划

B.需求分析

C.概要设计

D.详细设计

下列应税消费品中，应缴纳消费税的有( )。

A．进口高档家具

B．体育器材厂生产销售的高尔夫球及球具

C．建材城批发和零售实木地板

D．进口大型商务客车

使用一种治疗高血压的新药，在一个疗程后，记录用药后舒张压变化为随机变量X。今抽测18位病人用药后舒张压的变化数据（单位：毫米汞柱）为-5，-1，+2，+8，-25，+1，-12，-16，+5，-9，-8，-18，-5，-22，+4，-21，-15，-11在X～N（0，σ2）的假定下（σ2为未知数），试问对于σ=0.05的检验水准，该新药对治疗高血压是否有效

零假设为（）

A．H0:μ=0

B．H0:μ≠0

C．H0:μ＜0

D．H0:μ≤0

E．以上都不对