Unfortunately, George cannot be with us today so I am pleased to accept this award____ him.

A．in honor of

B．instead of

C．on behalf of

D．for lack of

在以下三种分子式中C＝C双键的红外吸收哪一种最强？（）（1）CH3-CH=CH2（2）CH3-CH=CH-CH3（顺式）（3）CH3-CH=CH-CH3（反式）

A.（1）最强

B.（2）最强

C.（3）最强

D.强度相同