【单选题】The star performer of comic dialogue is full of humor, who is able to ______an occasion whenever _____ go wrong with his humorous performances [ ]
【简答题】用IUPAC及普通命名法(如果可能的话)命名或写出结构式: a. (CH 3 ) 2 CHCHO b. c. d. (CH3)2CHCOCH3 e.(CH3)2CHCOCH(CH3)2 f. g. (CH3)2C=CHCHO h. CH2=CHCHO i. CH3COCH2CH2COCH2CH3 j. CH3CH2...
【简答题】There was once a professor of medicine, who was very strict with the students. Whenever he took the chair on the exam committee, the students would be in fear, because he was seldom pleased with the a...