---Some people like snakes very much． What about you，Mary?

----Not at all．I am        them．

A．pleased with

B．angry with

C．terrified of

D．good at.

盖层一般具有（）、相对不渗透或渗透性极弱的特性。

A.厚度大、岩性致密

B.厚度大、岩性坚硬

C.厚度小、岩性致密

D.岩性致密、孔隙度高