《黄河大合唱》的词曲作者是（）
A.田汉、聂耳
B.陈钢、何占豪
C.光未然、冼星海
参考答案：C
What is the third day of the week?[ ]
A. The third day of the week is Wednesday.
B. The third day of the week is Tuesday.
可见光波长范围为（）。
A.200～400nm
B.400～750nm
C.700～1000nm
