磺内酯及磺内酰胺

读东北地区年降水量分布图4（单位:mm），完成16～18题。

小题1:影响东北地区年降水量分布的主要因素有

①农牧活动          ②距海远近      

③季风风向         ④纬度位置

A．①③

B．②③

C．②④

D．①④小题2:东北平原农业生产的不利条件的是

A．年降水量不足，缺乏灌溉水源

B．纬度偏高，低温冻害影响农作物生长

C．耕地多为旱地，人均耕地多

D．广泛分布红壤，土壤肥沃小题3:我国政府停止开垦小兴安岭山脉，采取封山育林的措施，主要原因是

A．伐木难度大，成本高

B．开发特色森林旅游

C．进口木材，成本低

D．抚育更新森林资源

在回风流中的机电设备硐室进风侧（）。

A、最好安装甲烷传感器

B、必须设置甲烷传感器

C、根据实际决定

Friends play a very important part in everyone’s life. Friendship usually develops during childhood. New friends are made when you progress through school. Those friends that you make as a student can usually last long. Friends influence (影响) your development, maturity (成熟) and sense of responsibility. A familiar expression is “You can tell a lot about a person by knowing who his friends are.” Friendship is based on common interests. If you like sports, most of your friends are likely to be athletic (竞技的). If you enjoy reading and shopping, most of your friends do the same.

Some people call you their friends for the wrong reasons. These people are not really friends. They are superficial(表面上的) only “friends” on the outside, not the inside where it counts. Superficial friends only want to be your friends if it is to their advantage. True friends are there if you are rich or poor. It is easy to have many so-called “friends” if you are rich. By this time you should be able to separate your friends into the real or the “phoney”.

True friends are most special. They are also difficult to find. You can consider yourself very lucky if you have one true friend. This friend is eager to help you whenever necessary. He or she knows you would do the same for them. A true friend is someone you can talk to about any subject or problem. You and your true friend have good understanding of each other. True friends support you, take your side, and build up your confidence.

小题1:The first paragraph tells us _____.

A．how to make a true friend

B．we should make friend in our childhood

C．what is friendship based on

D．friends play a very important part in our life小题2:Which of the following is TRUE?

A．What you value above anything is the friendship developing during childhood.

B．The friendship developing during your school days will be with you for a long time.

C．Only through your friends’ influence will you take the responsibility for your task.

D．If you have no music in you, none of your friends will be a music lover.小题3:“So-called” friends in paragraph 2 refer to _____.

A．someone who only wants to be your friend when you are successful

B．those who want to benefit from you

C．the friends who are on the surface only

D．all the above小题4:Which of the following is NOT TRUE?

A．You should tell true friends from phoneys.

B．True friendship is too difficult to find.

C．You can share your joys and sorrows with a true friend.

D．A true friend will stand by you whatever happens.

表见代理本质上是无权代理。（）

下列药剂中属于真菌性生物药剂的是（）。

A.“Bt”制剂

B.昆虫性信息素

C.白僵菌