原子光谱分析是利用测定()进行定性定量分析的。
A、线光谱
B、带光谱
C、连续光谱
D、氩气光谱
参考答案:A
I would like to buy some good English reference books, but _______ was available from the bookstore, where I only found some Chinese ones.
A.nothing
B.no one
C.none
D.neither
目前使用最广泛的光纤连接口是()。
A.SB
B.SC
C.SD
D.SP