脑内转移癌的特点是（）
A.多发性病灶
B.可形成癌性脑膜炎
C.高颅压
D.癌中心常继发坏死
E.以上全部特点
参考答案：E
When people move to another country, they often try _________ the custom of their native land.
A．to keep on
B．to keep off
C．to keep up
D．to keep down
※ [5～7] .
(3 )
A．
B．
C．
D．
