每当周一升国旗、唱国歌时，悲壮激昂的旋律令我们热血沸腾。此时我们会深深怀念它的曲作者[ ]
A、
聂耳
B、
候德榜
C、
冼星海
D、
徐悲鸿
答案：A
对制粉系统运行有哪些基本要求？
A vessel would be referred to as tender when the weight of the cargo is（）.
A.evenly distributed vertically and the double bottoms are full
B.concentrated low and the double bottoms are empty
C.concentrated low and the double bottoms are full
D.concentrated high and the double bottoms are empty
