创造力的前提是（）。
A.发散思维
B.想象力丰富
C.智力优秀
D.品德高尚
参考答案：A
The children, ______ had played the whole day long, were worn out.
A．all of what
B．all of which
C．all of them
D．all of whom
液化石油气钢瓶运输的安全技术规程是什麽？
