0  343365  343373  343379  343383  343389  343391  343395  343401  343403  343409  343415  343419  343421  343425  343431  343433  343439  343443  343445  343449  343451  343455  343457  343459  343460  343461  343463  343464  343465  343467  343469  343473  343475  343479  343481  343485  343491  343493  343499  343503  343505  343509  343515  343521  343523  343529  343533  343535  343541  343545  343551  343559  447090 

27. ---- Do give me a call when you arrive in the city, Henry.

  ---- I won’t forget. See you later.

  ---- ____________.

  A. Have a nice trip    B. With pleasure   C. Don’t mention it   D. It’s kind of you

试题详情

26. If it were not for the fact that she _______ play tennis, I would invite her to join us.

  A. couldn’t      B. shouldn’t      C. might not      D. can’t

试题详情

25. The manager, ______his factory’s products were poor in quality, decided to give his workers further training.

  A. knowing      B. known       C. to know       D. being known

试题详情

24. ---- Have you seen Mike these days?

  ---- Yes. I saw him the day before yesterday. In fact, I ______ him for three years.

  A. didn’t see     B. haven’t seen     C. hadn’t seen     D. don’t see

试题详情

23. She had no idea how it _____ that her husband met with trouble again.

  A. came up      B. came about     C. came out      D. came across

试题详情

22. Talking about buying computers, I prefer a computer less than 8,000 yuan to ______ over the amount.

 A. this        B. it       C. that         D. one

试题详情

第一节:单项填空(共15小题;每小题1分,满分15分)

21. _______ good knowledge of several languages is essential to _____ study of comparative literature because without it one can read books only in translation.

 A.  A; the      B. A;  /     C. The;  the       D. /; the

试题详情

19.(本题12分)有机物A是一种重要化工生产的中间体,其结构简式为:C6H5-CH2CH(OH)COOH

(1)A中含有的官能团有:           (填名称)。

(2)A可能具有的化学性质有:       (填序号)

①能与H2发生加成反应;②能与在烧碱溶液中发生水解反应;③能与甲酸发生酯化反应;④能金属钠发生反应,且有机物A与反应生成的氢气物质的量之比为1∶1反应;⑤能与Ag(NH3) 2OH溶液发生银镜反应。

(3)写出A分别与乙醇、乙酸发生酯化反应的方程式:

                                

                                 

(4)在催化剂Pt的作用下,A与H2加成后的生成物的结构简式为     

试题详情


同步练习册答案