人类的眼睑中,双眼皮是显性性状,单眼皮为隐性性状,那么一对单眼皮的夫妇,生出双眼

题型:选择题

问题:

人类的眼睑中,双眼皮是显性性状,单眼皮为隐性性状,那么一对单眼皮的夫妇,生出双眼皮子女的机率为(   )

A.25%

B.50%

C.0%

D.75%

考点:基因控制生物的性状
题型:选择题

阅读下面短文,用括号内所给动词的适当形式填空 (必要时可加情态动词或助动词)。

One afternoon, when lessons were over, Peter and Paul did not go home. They stayed in school 小题1:____(help) their teacher to start a new library in the school. They carried books for him. They worked for one hour and then their teacher said, "Thank you, boys. We 小题2:____(finish )the work tomorrow. Now you must go home."

When the boys reached home, it was seven o ' clock. It was dark outside, but there was a 1ight inside their house and the door was open. They were surprised 小题3:____( see) a man inside. They could see the man 小题4:____(look) for something.

"He 小题5:_____(be )a thief, "Paul said." I 小题6:______( report) to the police and you try to talk to him. Then Peter went inside while Paul quickly小题7:______(hurry)off to telephone the police. When the man saw Peter, he looked frightened. Then he smiled and said, " You don ' t know me, but I’ m your father’s friend. He has asked me 小题8:____(find )some money for him.” In no time, two policemen arrived. As soon as the thief saw the policemen, he tried to run off. But he 小题9:______(catch) by the policemen.

Just then the boys ' parents returned."

“Is this man your friend? " one of the policemen asked Mr. Lee.

"No! " said Mr. Lee. "He is a thief . He wanted to steal my money. I am glad you小题10:_____(catch) him."

题型:选择题

前列腺素对子宫肌的作用,下列哪项是正确的()

A.有利于受精卵在子宫腔内生长发育 

B.不利于加速内膜脱落 

C.能引起子宫肌的收缩 

D.使肌纤维松弛 

E.能使非妊娠子宫肌收缩 

题型:选择题

在《科普法》中被称为科普主要社会力量的是()组织。

A.科协

B.科技局

C.农技协

D.教育局

题型:选择题

病理诊断羊水栓塞的依据是()

A.肺脏广泛出血

B.弥漫性肺毛细血管内透明血栓形成

C.肺泡内有角化上皮

D.肺毛细血管内有角化上皮

E.肺泡内透明膜形成

题型:选择题

当前全党面临的“四大危险”

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