目前为提高酸处理效果使用最多的方法是（），以使HF处理地层深处的粘土。 A.提高温度

短文改错（每小题1分，满分10分）

Now satellites are helped to forecast（预报）the 77．      

weather. They are in the space and they can reach              78．      

any part of the world. The satellites take photos for the      79．      

atmosphere（大气层）because weather formed there. They       80．      

send their photos to the weather station. But scientists 81．      

can see the weather of any part of the world.

Today nearly five hundreds weather stations in    82．      

sixty countries accept satellite photos. Scientists          83．      

compare the new ones from the earlier ones. Perhaps  84．      

they may find that the clouds have been changed        85．      

during the last few hours. This may mean that            86．      

the weather on the ground may soon change too.       

胺碘酮的主要作用机制是（）

A.抑制钠内流

B.抑制钙内流

C.抑制钾内流

D.阻断β受体

E.延长动作电位时间

所设贷款担保确有代偿能力并易于实现时指贷款担保必须具有（）

A.合法性

B.合理性

C.有效性

D.可靠性

在一个分类体系中常采用几种分类标志，往往每一个层级用一个适宜的分类标志。

下述( )语言为结构化程序语言。

A) Fortran语言
B) C语言
C) Basic语言
D) Cobol语言