俗话说：“梨树砍三刀，树枝压弯腰．”这是下列哪种原因所致（ ） A．叶片制造的有

Basca has ________his first prize at the Intel Science Talent Search, the premier national high school science competition.

A．landed

B．lent

C．rendered

D．brought

The patient looks much better .

-------_____is it that has made him ____he is today ?

A．what ; that

B．That ; that

C．What;which

D．What;what

深Ⅱ度烧伤，烧伤深度可达（）

A.表皮层

B.真皮层

C.真皮深层

D.皮肤全层

E.皮下组织

土的颗粒大小叫土的粒度成分。( )

钻遇淡水层时，水侵导致（）、（）及（），（）。