薄膜电池分为：（）和非晶硅薄膜电池。
参考答案：多晶硅薄膜电池
I wonder ______, Mr.Smith. We're looking for him everywhere. [ ]
A. where has your son been
B. where your son has been
C. where have you gone
D. where your son has gone
（）是三民主义的核心
A．民生主义
B．民族主义
C．民权主义
D．平均地权
