用基因型为AaBb的普通水稻的花粉进行离体培养，得到的植株幼苗再用秋水仙素处理，

You are going to high school , aren’t you ? Maybe you don’t know what to do . Here is a list of the top six things to do when you are in high school . These things will give you ideas of what  your high school life could be like . Here you go !

①Find your passion (激情)and what kind of person you are : Whether it’s dance ,basketball ,or drawing ,the important thing is that you have found something you are interested in .

② Talk to people you wouldn’t usually talk to : Meet new people ,find new friends and even talk to the people you don’t like. It will show what a great person you are . You never know what will happen after high school.

③Take part in at least one contest: This will give you tears of laughter, happiness and memories .

④Get a job : This will help you see what it’s like to have responsibility(责任 ) . It can also help you make a little money to spend on yourself .

⑤Take a trip with your friends :It doesn’t matter where you go or what you do , the memories will happen on the way and go on till the final place .

⑥Do your best at school : Don’t ever get lazy . Working hard now will help you in the future.

小题1:The writer mainly tells you six things you should do         .

A．in your high school years

B．at the beginning of your high school years

C．before your high school begins

D．after you finish your high school小题2:Which of the following you’d better not do according to the passage?

A．find your interest.

B．get a job

C．take a trip with your friends

D．get lazy小题3:What’s the main idea of the passage ?

A．Have a happy school life.

B．How to get along with your school mates.

C．Ideas of successful high school life .

D．Make your school life easy .

照明电器通常用（）作额定值。

囊痈肝经湿热可用：（）

A.阳和汤

B.泻热汤

C.橘核丸

D.萆薢分清饮

E.萆薢渗湿汤

男孩6岁，反复腹痛3个月，以脐周痛为主，疼痛多在十几分钟内自然缓解。查体：全身皮肤无黄染及出血点，腹平，全腹软，无压痛，未触及包块，直肠指检(-)。血WBC8×10／L，P46％。腹部B超未发现异常征象。下列疾病中，哪一种可能性最大

A．慢性阑尾炎

B．胆道感染

C．肠痉挛症

D．阶段性肠炎

E．腹型过敏性紫癜

齿轮传动的缺点包括（）

A.重量大

B.噪音大

C.传动距离较小

D.需要经常润滑