氢元素的光谱发现者是()
A、牛顿
B、巴耳麦
C、里德堡
D、普朗克
参考答案:C
-- Must we go there together?
--______ you ________ he goes there, only one student is needed.
A. Both; and B. Either; or C. Neither; nor
描绘边疆奇异风光最为杰出的盛唐诗人是( )
A.王昌龄
B.王之涣
C.李颀
D.岑参