【单选题】旅游接待服务工作中处在第一线的关键人物是( )
【单选题】Please go to the seaside to swim, to get suntanned. A. B. C.
【单选题】Seldom ______ to see his uncle.
【单选题】--Mike seldom has breakfast at home, _______? -- _______ this morning.
A.
does he; No, but he did
B.
does he; No, he hasn’t
D.
hasn’t he; Yes, he doesn’t
【单选题】— you please go to the movies with me? —Sorry, I can't. I do my homework. [ ]
【单选题】某质点的运动方程为 (SI),则该质点作: