切粒干燥器堵塞时应该注意（）。
A、提高产量
B、处理时间尽量短
C、干燥器内切片应清理干净
D、降低风机风量
参考答案：B, C
When you begin a sentence with "don't tell anyone but... " there's a 90% chance that the person,
_____ someone.[ ]
A. tells
B. would tell
C. will tell
D. has told
常规晶体硅电池转换效率平均每年提升（）。
A.20%～23%
B.16%～18%
C.20%～21%
D.9%～11%
