长是4.5厘米，宽和高都是3厘米的长方体表面积是（ ）平方分米。
0.72
语句Y=Y+1的正确含义是( )。
A．变量Y的值与Y+1的值相等
B．将变量Y的值存到Y+1中去
C．将变量Y的值加1后赋值给变量Y
D．变量Y的值为1
The Natural Approach believes that the teaching of （） should be delayed until comprehension skills are established.
A. listening
B. speaking
C. reading
D. writing
