问题 实验题

下图为枝芽与一段枝条的结构图,据图同答:(14分)

(1)观察图1完成各部分名称:

a___________、b___________、c___________、d___________、e、___________

(2)、图2为一段枝条的结构图。

⑴图2中的[g]       是由图1中的[ ]                      发育而来的。 

⑵图2中的[h]       是由图1中的[ ]       发育而来的。

⑶图2中的[f]       是由图1中的[ ]       发育而来的。

答案

生长点 叶原基    幼叶        芽轴        芽原基         ⑴叶、「c」幼叶      ⑵茎、「d」芽轴 ⑶侧芽、「e」芽原基

该题考查的是叶芽的结构和叶芽发育的结果,叶芽是由芽轴、叶原基、芽原基、幼叶、生长点组成的,图2中的g是叶,是由叶芽的幼叶发育来的,h是茎,是由芽轴发育来的,f是侧芽,是由芽原基发育来的。

阅读理解

Young people and older people do not always agree. They sometimes have different ideas about living, working and playing. But in one special program in New York State, adults and teenagers live together in a friendly way.

Each summer 200 teenagers and 50 adults live together for eight weeks as members of a special work group. Everyone works several hours each day. They do so not just to keep busy but to find meaning and fun in work. Some teenagers work in the forests or on the farms near the village. Some learn to make things like tables and chairs and to build houses. The adults teach them these skills.

There are several free hours each day. Weekends are free, too .During the free hours some of the teenagers learn photo-taking or drawing. Others sit around and talk or sing. Each teenager chooses his own way to pass his free time.

When people live together, they should have rules. In this program the teenagers and the adults make the rules together. If someone breaks a rule, the problem goes before the whole group. They talk about it and ask, “Why did it happen? What should we do about it?”

One of the teenagers has said something about it: “You have to stop thinking only about yourself. You learn how to think about the group.”

小题1:In one special program in New York State, young and older people_________.

A.don’t work well together

B.live together like friends

C.teach one another new ways of building houses

D.spend eight weeks together, working as farmers小题2:All the members work some time every day mainly to_______.

A.lead a busy life

B.learn new skills of farming

C.get used to the life on the farms

D.find useful things and pleasure in work小题3: Living together__________.

A.the teenagers don’t have to obey the rules

B.the members have to obey the rules the adults make

C.the members have no free time but on weekends

D.the members should not break the rules they make together小题4: The last paragraph shows that the teenager thinks this the program is_________.

A.unpleasant

B.tiring

C.helpful

D.boring小题5:The best title for the passage is ____________ .

A.The Rules of Living Together

B.Life in New York State

C.Teenagers and Adults Together

D.Free Hours in the Special Work Group

单项选择题