药皮和焊剂能够保护焊缝，限制空气侵入焊接区。

阅读理解。

     Many teenagers feel that the most important people in their lives are their friends. They believe that their

families don't know them as well as their friends do. In large families, it is quite often for brothers and sisters

to fight each other and then they can only go to their friends for some ideas. It is very important for teenagers

to have one good friend or a group of friends.

     Even when they are not with their friends, they usually spend a lot to time talking among themselves on the

phone. This communication is very important in children's growing up, because friends can discuss something. There things are difficult to their family members.

     However, parents often try to choose their children's friends for them. Some parents may even stop their

children form meeting their good friends. Have you ever thought of the following questions?

     Who choose your friends? Do you choose your friends or your friends choose you? Have you got a good

friend your parents don't like? Your answers are welcome.

1. Many teenagers think that their _____ can understand them better.

A. sisters

B. brothers

C. friends

D. parents

2. _____ is very important to teenagers.

A. Making friends

B. Meeting friends

C. Living with friends

D. Fighting with friends

3. Teenagers usually like to ______.

A. go to their brothers and sisters for help

B. communicate with their parents

C. make friends with their parents

D. discuss something with their friends

4. The sentence "Your answers are welcome" means "_____"

A. Your answer are right

B. You should give us all the right answers

C. We'd like to have your ideas about the questions

D. You are welcome to understand your friends.

5. According to the writer, parents should _____.

A. choose for their children

B. understand their children better

C. welcome all their children's friends

D. stop their children from choosing friends.

对独家代理贸易方式与包销贸易方式的正确说法是( )。

A．代理人与委托人之间为委托代理关系，而包销商与出口人之间为买卖关系

B．代理人赚取的是佣金，包销商赚取的是商业利润

C．两者专营权不同

D．都属于逐笔售定贸易方式

按要求默写名篇中的名句

⑴《木兰诗》中描写战事频繁而惨烈，木兰经历了漫长的战斗岁月而最终英雄般凯旋的两句诗是：                        ，                         。

⑵王湾的《次北固山下》一诗中包含：

                        ，                         。

⑶陶渊明在《饮酒》中表现自己俯仰之间悠然自得，与自然融为一体的诗句是：                        ，                         。

⑷曹操的《观沧海》抒发气吞山河的博大胸襟的诗句是：

                        ，                         。

⑸《生于忧患，死于安乐》中分析亡国原因的句子是：

                        ，                         。

⑹《邹忌讽齐王纳谏》一文中，邹忌分析齐王受蒙蔽原因的句子是：

                        ，                         。

双排钢管扣件式脚手架一个步架高度以（）较为适宜。

A.1.5m

B.1.2m

C.1.6m

D.1.8m