指示气候的湿热环境的化石是（）。
A.珊瑚
B.苏铁
C.银杏
D.云杉
参考答案：B
I can't _____ any good advice to give her. [ ]
A. think for
B. think of
C. think up
D. think over
UAP3300登录有三种维护模式，分别是（）。
A.view
B.config
C.debug
D.super
