在钻头上的螺旋角，在不同半径处的大小是（）的。

任务型阅读。

Tina, Mike, Jeff, Linda和Vera在生活、学习和运动中遇到一些问题，请阅读下面五个片段，并从后面的选项(A-E)中帮他们找到解决问题的方法或建议。

( )1. Tina has been invited to one of her friends' birthday party next Sunday. She is worried about this

            now because she has never taken part in any birthday party, and nobody can tell her something 

             about it.

(     )2. Mike's favorite is playing sports. He gets up early at 6:00 every morning. Then he goes out to 

            exercise by the riverside. He runs along the river for nearly half an hour, and then takes a walk 

            for a few minutes. He goes back home for breakfast at 7:30. But he always feels weak after 

            morning exercises.

(     )3. Jeff is interested in the computer. His parents bought him a Dell computer last month. He wants 

            to surf the Internet. But he heard that there are many terrible things for kids on the Internet. His 

            parents don't have the knowledge about this.

( )4. Linda's parents will be away for China on business for more than half a year very soon. She can't 

            go with them because she has to go to school. She will be at home alone. Nobody will take care 

            of her, and she can't do chores herself.

( )5. Vera is a clever girl. She does well in her studies. But Vera doesn't like playing with her 

            classmates, and she feels bored when her classmates ask her questions about studies. So she 

            can't get along well with her classmates.

                                                               A

     Don't give your personal information such as your address, telephone number, etc. on the Internet

without your parents' permission. Never agree to get together with someone you "meet" online and never

send a person your picture or anything else without first checking with your parents.

                                                              B

     On the day of the party, make sure you arrive on time and show that you're happy to be there. Wear

something suitable. Greet your friend with a "Happy Birthday" and hand over the gift. Make sure you have

put a card with your name on it.

                                                              C

     Always smile, so people don't think you are serious and hard to get along with. Be polite and modest.

If you are rude, people will not like you. If people have troubles, you help them. Then, when you have

troubles, they will help you, too.

                                                               D

     Parents should get the kids to do their chores around the house. If their clothes need washing, they

wash them themselves. Let the kids prepare their own meals. Let them clean their room, cook for them-

selves, wash the dishes, etc.

                                                               E

    Let's say that the last time you eat something at night is at 6 or 7 pm (just an example). The following

day, you don't eat breakfast but wait until you finish sports - you've gone many hours with nothing in your

stomach. Your body has to work hard. It's not good. What's more, consider reducing the time and

strength of your morning exercises.

与40°W共同组成经线圈的另一条经线的经度是（　　）

A．120°E

B．140°E

C．180°

D．140°W

下列各句中标点符号正确的一句是  （   ）

A．到底是称赞我的什么呢?是有几处画得好?还是勇气可嘉，什么都敢画?或者根本就不是称赞，只是对于失败者的无可奈何的安慰。

B．粥菜，这是不可能有的。有几个慈祥的老板到菜场上去收集一些菜叶，用盐一浸，这就是他们难得的“佳肴”。

C．我们从古以来，就有埋头苦干的人、有拼命硬干的人、有为民请命的人、有舍身求法的人……，虽是等于为帝王将相作家谱的所谓“正史”，也往往掩不住他们的光耀，这就是中国的脊梁。

D．在圣马克方场的钟楼上看，团花簇锦似的东一块西一块在绿波里荡漾着。远处是水天相接，一片茫茫。这里没有什么煤烟，天空干干净净；在温和的日光中，一切都像透明的。

眼科器械消毒最安全、最常用的是

A．浸泡消毒

B．高温高压蒸汽消毒

C．熏蒸消毒

D．环氧乙烷消毒

认同实质上就是对榜样的______，其出发点是试图与榜样一致。