进行一个S111网络的PN规划，PILOT_INC为3，将每个簇分为4个子簇，则需要个簇。（）
A、3
B、4
C、5
D、6
参考答案：A
How could you walk into the lab with your shoes?You're________to take them off before you
enter it.I told you so![ ]
A. hoped
B. supposed
C. allowed
D. permitted
下列哪个赋值语句是不正确的
A．float f=11.1；
B．double d=5.3E12；
C．float d=3.14f；
D．double f=11.1E10f；
