玉米制种中割除父本有哪些好处?

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问题:

玉米制种中割除父本有哪些好处?

考点:农学种子生产学种子生产学题库
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完形填空。
      Why    1   children go to school? Do you  know?  You  may    2    that  they  go  to  school  to  learn
Chinese, English and some  3     subjects. This answer is   4    .But do you know    5   they learn all these
things? Do they  learn all these things    6   school?
      The answer is "on".Children must learn how to learn at school. No one can learn   7    at school.When
they    8   school they must continue( 继续)to learn. So  a  good  teacher at  school   9   his   students   to 
learn something and teaches them the ways of learning it. Then children can continue to learn    10   after
they leave school.

( )1.A. can  
( ) 2.A. say  
( ) 3.A. another      
( ) 4.A. right 
( ) 5.A. which   
( ) 6.A. for    
( ) 7.A. something    
( ) 8.A. leave  
( ) 9.A. teach    
( ) 10.A. good    

B. do  
B. speak
B. an other
B. wrong  
B. who      
B. to   
B. nothing   
B. over   
B. teaches   
B. fine    
C. may  
C. talk   
C. other  
C. hard   
C. what    
C. at    
C. anything    
C. go to   
C. teaching    
C. nice     

D. are
D. tell
D. the others
D. easy
D. why
D. on
D. everything
D. begin
D. is teaching
D. well

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相差显微镜装有的特殊部件()

A.相差物镜、滤光片和转盘聚光器

B.偏振器、转盘聚光器和相差物镜

C.光片、相差物镜和补偿器

D.相差物镜、转盘聚光器和台轴调中望远镜

E.偏振器、滤光片、补偿器

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—Did you have        nice holiday?

—Yes,it was        best holiday Ive ever had.

A.the;the

B.the;a

C.a;a

D.a;the

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《娱乐场所管理条例》规定:歌舞娱乐场所设置的包厢、包间应当安装展现室内整体环境的透明门窗,并不得有内锁装置。( )

题型:问答题 简答题

我国最重要的转口市场是()

A.美国

B.日本

C.香港

D.台湾

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