促性腺激素的种类及其作用是什么?

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问题:

促性腺激素的种类及其作用是什么?

考点:职业技能鉴定家畜繁殖学家畜繁殖学题库
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下列溶液中含Cl-浓度最大的是(  )

A.10mL0.1mol/L的AlCl3溶液

B.20mL0.1mol/LCaCl2溶液

C.30mL0.2mol/L的KCl溶液

D.100mL0.25mol/L的NaCl溶液

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下列关于传染性非典型肺炎流行病学特点,错误的是

A.病人是主要的传染源

B.有的病人可以造成数十甚至数百人传染,被称为“超级传播者”

C.飞沫传播,短距离飞沫传播,是本病的主要传播途径

D.传染性非典型肺炎只能通过呼吸道传播

E.人群普遍易感,发病者以青壮年居多

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随州市传说为黄帝的故里。 ( )

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Cloze.
     The British love to think of themselves as polite, and everyone knows how fond they are of their "pleases"
and "thank you". Even the simplest business such as buying a train ticket requires   1   seven or eight of these.
Another   2   of our good manners is the queue. New-comers to Britain could be forgiven for thinking that
queuing rather than football was the   3   national sport. Finally, of course, motorists generally stop at crossings.
But does all this mean that the British should consider themselves more polite than their European neighbours?
I think not.
     Take forms of address (称呼) for example. The average English person-  4   he happens to work in a hotel
or department store-would rather die than call a stranger "Sir" or "Madam". Yet in some European countries this
is the most basic of common address. Our   5   "you" for everyone may appear more democratic, but it means
that we are forced to seek out complicated ways to express   6  . I am all for returning to the use of "thee" and
"thou" (Thee and thou are old-fashioned poetic words for "you"); "you" would be   7   for strangers and
professional relationships.
     And of course, the English find touching and other shows of friendship truly terrifying. Have you noticed
how the British   8   ever touch? Personally, I find the Latin habit of shaking hands or a friendly kiss quite
charming. Try kissing the average English person, and they will either take two steps backwards in horror ; or,
if their escape is   9  , you will find your lips touching the back of their head. Now what could be  10  than that?
( )1.A. at least  
( )2.A. signal   
( )3.A. true      
( )4.A. if       
( )5.A. universal
( )6.A. politeness
( )7.A. ordered  
( )8.A. highly   
( )9.A. confirmed  
( )10.A. better  
B. at most   
B. scene     
B. original  
B. whether   
B. unique   
B. gratitude  
B. reserved  
B. mostly   
B. assured       
B. ruder     
C. less than   
C. sign       
C. superior   
C. when       
C. regular     
C. democracy   
C. offered     
C. hardly     
C. jammed     
C. more polite  
D. not more than      
D. sight              
D. advanced           
D. unless             
D. normal             
D. consideration      
D. stocked            
D. nearly             
D. blocked            
D. more frightening             
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美国成立了第一家“广告阅读资料公司”——达尼爱尔·斯塔奇公司,开展测试阅读状况的业务是在______

A.1931年
B.1932年
C.1935年
D.1937年

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