如果生物圈中植物大量减少，大气中急剧增加的成分是[ ] A．二氧化碳 B．氧气

任务型阅读。

                                                 Should kids do chores?

     People find that children as young as 18 months can help with chores When parents say to those

children, "Just look at the paper," they will pick it up.

     Some parents think childhood is just for playing, so they don't ask their children to do chores. Other

parents say, "I know it's wrong, but it's quicker to do it by myself !" But most parents believe that chores

are a way of teaching kids responsibility (责任). Children learn to help, share and care about others by

doing chores. Things like taking care of a pet or a baby and helping make meals are some examples (例子) of helping others.

     Reasons for doing chores;

     ★To learn responsibility: Most people believe that doing chores is good for kids.

     ★To share the workload: Kids that help clean won't make a big mess.

     ★To learn skills: Kids will learn how to cook, clean and do other things in the house.

     There are  benefits (益处) and challenges (挑战) when doing chores, so start to help your parents

with the chores. You will learn a lot by doing them.

根据短文内容，完成下列各题。

1. People find that children as _____ as 18 months can help with _____.

2. Some parents think childhood is just for _____. 

3. Other parents know that chores are a way of teaching kids _____.

4. Reasons for doing chores:

    (1) To learn the responsibility.

    (2) To share the workload.

    (3) _____ _____ _____.

5. There are _____ and _____ when you do the chores, so start to help your parents with the chores.

已知ι，m是两条不同的直线，α是一个平面，以下命题正确的是（　　）

A．若l⊥α，l⊥m，则m⊂α

B．若l∥α，m⊂α，则 l∥m

C．若l⊥α，m∥α，则 l⊥m

D．若l⊥α，l⊥m，则 m∥α

女，29岁，妊娠32周，3周内 * * 少量流血二次。今凌晨突然 * * 流血多于月经量，无腹痛，血压13.3/10.7kPa，脉率96次/分，宫高30cm，腹围85cm，臀先露，未入盆，胎心音清楚，144次/min。

下述何项处理是错误的（）

A.住院观察

B.绝对卧床休息

C.配血备用

D.口服镇静药片

E.肛指检查

尾矿库在（）水位的情况下，选矿厂应停止运行。

A.正常水位

B.警戒水位

C.紧急水位

WORD文档中PgUp按钮的作用是（）

A.上移一行

B.下移一行

C.前移一屏

D.后移一屏