开展外照射的辐射诱变育种时,由于辐射源与被照射材料接触的机会小,故应尽可能地加大辐射

题型:判断题

问题:

开展外照射的辐射诱变育种时,由于辐射源与被照射材料接触的机会小,故应尽可能地加大辐射剂量,来达到诱变的目的。

考点:农学园林植物病虫害防治园林植物病虫害防治题库
题型:判断题
The weekend comes again. Grace is       with her mother. She wants her mother to      a new coat for her.
In a clothes shop, she finds an orange coat. That’s her favourite colour. She tries it on, but it is too      . She wants a larger (较大的) one. But the larger one is not       . Grace doesn’t like other colours. Her mother says, “      go to another shop to have a look.” Then they go out of the shop and come into the next one.
This shop is very big and there        many kinds of coats. Grace likes an orange one and asks, “       is it?”
“538 yuan,” answers the shop assistant (店员).
Grace’s mother        it is too expensive and she doesn’t have so        money with her.
“Would you like this orange one? It’s only 210 yuan,” says the shop assistant.
“Oh, it looks good. Do you think so, Grace?”
“OK. Let’s        it.” Grace’s mother pays for it.
小题1:
A.dancingB.cookingC.playingD.shopping
小题2:
A.makeB.buyC.leaveD.carry
小题3:
A.largeB.smallC.cheap D.expensive
小题4:
A.orange B.whiteC.yellow D.black
小题5:
A.We’reB.They’reC.Let’s D.It’s
小题6:
A.isB.areC.has D.have
小题7:
A.How manyB.How muchC.What color D.What size
小题8:
A.talks B.speaksC.says D.tells
小题9:
A.many B.muchC.few D.little
小题10:
A.take B.tidyC.compare D.enjoy
题型:判断题

2013年,《中国国家地理》杂志举办了我国民居摄影展活动,下图是读者拍摄的我国两个地区的民居照片。读图回答下列各题。

小题1:下列叙述正确的是

A.丽江民居比蒙古包的防雨耐水性差

B.丽江民居比蒙古包的防风保暖性好

C.蒙古包所在区域的环境人口容量小

D.蒙古包是当地牧民永久居住的住所小题2:解决图10所在地区居民生活能源问题的最合理措施是

A.建风力发电站

B.建造沼气池

C.营造薪炭林 

D.割草拾柴

题型:判断题

观察下面的漫画《乌鸦喝水》,简述漫画内容并揭示其寓意。

题型:判断题

下列何种微生物导致的疾病为人兽共患病()

A.军团菌

B.肺炎链球菌

C.钩端螺旋体

D.梅毒螺旋体

E.支原体

题型:判断题

交接箱(间)必须设置地线,接地电阻不得大于()Ω。

A.30

B.25

C.15

D.10

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