两河流域文明的质料是（）？
A、石料
B、木头
C、泥土
D、森林
参考答案：C
求一个圆柱形水桶能盛多少水，就是求水桶的[ ]
A．侧面积
B．表面积
C．容积
D．体积
They'd like _____ thank the following people _____ their help and support.[ ]
A. to; to
B. for; for
C. to; for
D. for; to
