自阀在运转位，均衡风缸压力上升缓慢有哪些原因？如何处理？

染色体和基因的正确关系是（　　）

A．很多基因排列在染色体上

B．很多染色体排列在基因上

C．基因是染色体的另一种叫法

D．染色体在细胞核时叫基因

I remember growing up, my mom always said, “Half the fun of doing anything is sharing it with others.” It is so true. Friends and mates allow us to enjoy our success and our joys, comfort us in our challenging moments, and provide a mirror for us to learn more about ourselves. I’ve always looked at friends as the family we choose. They enrich our lives. As Robert Louis Steven once said, “A friend is a present which you give yourself.”

To be a good friend or partner, it’s importable be a good listener. Hear what your friend or mate has to say first rather than jumping to conclusions or getting defensive. Sometimes it is useful to be their mirror, for when they hear their words repeated back to them; it can help them to realize that what they said was not exactly what they meant to say.

Patience, compassion and empathy are also important traits in being a good friend or partner. You know the old golden rule, “Care for others the way you would like them to care for you.” The support of a friend during a tough time could make the difference between success and failure. Encouragement and confidence are priceless gifts that can help change a person’s life.

Take care, though, with whom you choose to have close relationship, for they can have a tremendous impact on your self-esteem and life path. As someone once told me, “the attitude of your friends is like the buttons on an elevator. They will either take you up or down.”

小题1:In order to make good friends, you should do the following except ______.

A．Be a good listener

B．Be patient, compassionate

C．Be careful

D．Be generous to your friends小题2:What will you do to your friends according to the passage?

A．Buy your friend a mirror.

B．Point out their mistakes if there is any

C．Give them encouragement and confidence.

D．Pay attention what they do小题3:What does the underlined sentence in the passage mean?

A．It is different whether you have friends or not.

B．The support of friends counts when you have difficulties.

C．A friend in need is a friend indeed.

D．You are certain to succeed if you get the support of friends.小题4:Which of the following statements is not right according to the passage?

A．It is good to share your fun with other.

B．The friend is a mirror for us to learn more about others.

C．You’d better be a good listener if you want to be a good friend.

D．Be careful to choose your friend.

一个小孩在结冰的河面上玩耍，突然发现脚下的冰层即将要破裂，他应（　　）

A．立即站着不动，大声呼叫

B．改成单脚站立，减小压力

C．轻轻伏在冰面，爬向岸边

D．加快速度跑开，逃离冰面

如图所示是利用了人体运动理论和巧妙的力学原理而制作的游龙板。它是利用人的身体、双脚扭动及手的摆动来驱动前进，深受广大中小学生的喜爱。当人和滑板加速前进时受到的摩擦力是 _______（选填“有益”或“有害”）的；当需要停下来时要用脚踏住后面的刹车块，这是靠增大压力来_________ （选填“增大”或“减小”）摩擦的，这时的摩擦是_________ （选填“有益”或“有害”）的。