乘除的混合算式题，计算时应按照□的顺序计算。□内应填[ ]
A. 先除后乘
B. 先乘后除
C. 从左向右
答案：C
—Why do you look sad?
—There are so many problems .[ ]
A. remaining to settle
B. remained settling
C .remaining to be settled
D. remained to be settled
钢串片散热器的串片采用（）的薄钢片，每个串片两边折成90°角。
A.0.8mm
B.0.6mm
C.0.7mm
D.0.5mm
