距当地800千米范围内有热带气旋,48小时内可能影响当地时,台风灯光信号为()。
A、白白白
B、白绿白
C、白绿绿
D、绿绿绿
参考答案:A
The schoolboy regretted _______ after he didn't pass his exam.
A.the time on TV
B.to spend so much time on TV
C.taking most of his time on TV
D.spending so much time on TV
能参与髓鞘形成的神经胶质细胞,在中枢神经系统为小胶质细胞,在周围神经系统为施万细胞。()