在一张长80厘米,宽62厘米的铁皮上剪下一个最大的圆.这个圆的半径是______.
62÷2=31(厘米).
故答案为:31厘米.
Owing to her balanced diet and regular exercise, she is very slim and athletic _____.
A.in height
B.in shape
C.in detail
D.in sight
我二期锅炉水冷壁管全部采用螺纹管。