某台水轮机在30min旋转了4500rpm,求该水轮机的转速为多少?
参考答案:
n=4500/30=150r/min
答:该水轮机转速为150r/min。
根据句意,在每个句子的空白处填入一个适当的词,使句子意思完整,语法正确。
1. Amy began ice skating ________ the age of four.
2. Liu Xiang was ________ in 1983 in Shanghai.
3. Yesterday I did some morning exercises and ________ a little breakfast.
4. I stayed at home and ________ TV yesterday.
5. The boy ________ Li Ming is my friend.
One Yield是哪个酒店集团推出的收益管理系统()
A.假日酒店(Holiday Inn)
B.玛丽奥特国际酒店(Mariott International Hotels)
C.希尔顿国际酒店(Hilton International)
D.韦斯汀酒店(Westin Hotels)