叶不为羽状复叶的树种是() A.枫香 B.香樟 C.香椿 D.香柏

题型:多项选择题

问题:

叶不为羽状复叶的树种是()

A.枫香

B.香樟

C.香椿

D.香柏

考点:园林树木学园林树木学题库
题型:多项选择题
短文改错。
Americans use the water more than any other      
people in the world. If we continue to use it        
as freely as we did now,we soon won't have           
many to meet our needs. In 1900,40 billion gallons    
of water is used each day in the United States.  In  
1980,700 billions gallons were used on average.      
Americans now use mostly 90 gallons of water a day. 
And much more water is used to making the things      
American people are like to have. For example,it    
takes thousand of gallons of water to make just      
one pound of beef on the dinner table.
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题型:多项选择题

与化脓性脑膜炎脑脊液相符的特点是

A.外观混浊

B.压力增高

C.蛋白质含量减少

D.细胞数增多

E.糖、氯化物减少

题型:多项选择题

胰岛分泌的激素有()。

A.胃泌素

B.胰升血糖素

C.生长抑素

D.胰岛素

E.降钙素

题型:多项选择题

在基因工程中常用的工具酶有[ ]

A.解旋酶

B.限制性内切酶

C.DNA聚合酶

D.纤维素酶

题型:多项选择题

B/S体系结构的优点有什么?

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