根据辐射能量传递方式，光谱方法可分为（）
A、发射光谱
B、吸收光谱
C、X射线衍射
D、拉曼光谱
E、荧光光谱法
参考答案：A, B, D, E
What a pity! I _____ in London for three more days, but something urgent needed to be dealt with back in Beijing.
A．must have stayed
B．could have stayed
C．may have stayed
D．needn’t have stayed
毛果芸香碱滴眼可引起（）。
A．缩瞳，降低眼内压，调节麻痹
B．缩瞳，降低眼内压，调节痉挛
C．扩瞳，升高眼内压，调节麻痹
D．扩瞳，升高眼内压，调节痉挛
