【简答题】小题1: The movie is about two__________. A.cats B.kids C.persons D.tickets 小题2:If Jim and Bob want to see the movie in the evening, they have to pay_________. A.£6.50 B.£9.00 C.£11.00 D.£13.00 小题3: Whic...
【单选题】Suppose we have some optically pure (R)-2-butyl acetate that has been “labeled” with theheavy isotope at one oxygen atom as shown. The compound is hydrolyzed under Acid-catalyzed, we predict the butan...