【判断题】关于儿茶素的几何构型和旋光异构,“L”表示左旋。
【单选题】____Are you pleased with the performance?----- Not at all. It couldn’t have been_____A.worseB.so
A.
15. ____Are you pleased with the performance? ----- Not at all. It couldn’t have been_____ A.worse
【单选题】If you want to change for a double room, you'll have to pay ______ $15.
【单选题】—Will you go to the party tomorrow, Xiao Hai? —No, ____ I was invited to.A.as long asB.so far asC
A.
15.—Will you go to the party tomorrow, Xiao Hai? —No, ____ I was invited to. A.as long as
【单选题】--- Who are the teenagers gathering at the school gate? --- Well, if you _____ know, they are al
A.
15. --- Who are the teenagers gathering at the school gate? --- Well, if you _____ know, they are all my visiting students. A.need