NOSQL是（)的缩写。 A: A.Not SQL B: B.Not Only SQL C: C.Not Use SQL D: D.Now SQL

The professor encourages us to_________opportunities instead of waiting for good luck A: A.get caught in B: B.reach for C: C.not necessarily D: D.at the moment

中国大学MOOC: 1、对于逻辑运算结果的取反操作指令为（ ）。A.ED B.EU C.NOT D.NO

The change of a city is_________a change in its becoming more beautiful and fashionable. A: A.get caught in B: B.continue on C: C.not necessarily D: D.at the moment

You’d better _______ computer games for a long time． A: A．no playing B: B．not to play C: C．not play D: D．don’t play

——I hope the children won´t touch the dog. ——I´ve warned them ______. A: A.not B: B.not to C: C.not touch D: D.not do

We completed one third of the project, and the loan _______ in place, we had to delay the rest till the next month. A: A．not arranged B: B．was not arranged C: C．not arranging D: D．had not been arranged

18．It was back home after the experiment.A．not until midnight did he goB．until midnight that he didn’t goC．not until midnight that he wentD．until midnight when he didn’t go A: A．not until midnight did he go B: B．until midnight that he didn’t go C: C．not until midnight that he went D: D．until midnight when he didn’t go

比较C≡C, C=C, C─C, C=C─C=C的键长次序为: C=C─C=C>C─C> C≡C >C=C|C=C─C=C>C─C>C=C>C≡C|C≡C>C=C>C─C>C=C─C=C|C─C>C=C>C=C─C=C>C≡C|C─C>C=C─C=C>C=C>C≡C

下列哪种主链骨架原子排列最能代表两个肽键?() A: Cα—N—Cα—C—Cα—N—Cα—C B: Cα—N—C—C—N—Cα C: C—N—Cα—Cα—C—N D: Cα—C—N—Cα—C—N E: Cα—Cα—C—N—Cα—Cα—C