一个圆柱体,侧面展开是一个正方形,它的边长是18.84厘米,圆柱的底面半径是______.
18.84÷3.14÷2=3(厘米),
答:圆柱的底面半径是3厘米.
故答案为:3厘米.
Not only he but also his parents _____China for two years .
A.have been in
B.has been in
C.has come to
D.have come to
季节性大扫除一般包括()。
A.客房设备
B.床上用品
C.家具
D.客用租借用品