生活在海洋中的乌贼(如图)遇到鲨鱼等敌害时,会喷出墨汁,染黑海水,乘机逃跑,这种

题型:选择题

问题:

生活在海洋中的乌贼(如图)遇到鲨鱼等敌害时,会喷出墨汁,染黑海水,乘机逃跑,这种现象说明生物具有的特征是(   )

A.生物的生活需要营养

B.生物能进行呼吸

C.生物能排出身体内产生的废物

D.生物能对外界刺激作出反应

考点:生物及其特征
题型:选择题

阅读理解。

  One day Mr. Li and Mr. Zhang go to London to see a friend. They don't know much English and they

know little about London. They can't find their friend's home. They walk in the street for a long time. They

see a man near a bus stop. They go up to him and ask the way. The man smiles but say nothing. Then he

puts his hand into his pocket and takes out a book. He opens the book and reads,"I'm sorry, I can't speak

English." In the evening they find their friend's home with the help of the policeman.

判断正(T)误(F)。  

( )1. Mr. Li and Mr. Zhang know much about London.   

( )2. They can speak much English.   

( )3. The man near the bus stop helps them find their friend's home.   

( )4. They don't see any policeman in London.   

( )5. The man near the bus stop can't speak much English like Mr. Li and Mr. Zhang.

题型:选择题
用竖式计算。
(1)450×0.88(2)17.39×1.16
题型:选择题

如果你的住房是2006年以后的新建楼房,那就带有外墙保温层。可见()。

A.只有2006年以后新建的楼房才带有外墙保温层

B.所有2006年以后新建的楼房都带有外墙保温层

C.有些2006年以前新建的楼房也带有外墙保温层

D.所有2006年以前新建的楼房都不带有外墙保温层

题型:选择题

决定人的血型的特定遗传功能单位是(  )

A.细胞核

B.染色体

C.DNA

D.基因

题型:选择题

环指是

A.颈5 支配
B.颈6 支配
C.颈7 支配
D.颈8 支配

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