创业需要面对的问题之一是满足哪些人的哪些需要。
参考答案：对
A÷1.8=B÷7.2（AB都不等于0），则A÷B=______．
___________ should not be allowed to go out at night.
A．Twelve-years -old
B．Twelve-year-olds
C．Twelve years old
D．Twelve year olds
