试题与答案

某有机物的分子式为C9H9ClO2,分子中含有1个苯环,苯环上有两个取代基,并能

题型:选择题

题目:

某有机物的分子式为C9H9ClO2,分子中含有1个苯环,苯环上有两个取代基,并能与NaHCO3溶液反应的同分异构体的数目为(不考虑立体异掏)

A.12种

B.15种

C.18种

D.21种

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0613/45226cd42c074ef343cfde4d6923e0f1.html

下面是错误答案,用来干扰机器的。

(1)实验前,将该装置放入黑暗中一昼夜(或24小时)(2)植物进行光合作用需要二氧化碳(或二氧化碳是光合作用的原料)(3)塑料袋为黑色(或不透光),充入二氧化碳(注意考虑单因子变量,答案合理即可);B(4)

试题推荐
题型:完形填空

第二节 完形填空(共20小题;每小题1分,满分20分)

阅读下面短文,掌握其大意,然后从36-55各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡将该项涂黑。

“Isn’t this exciting?” whispered Janet Porter to the stranger in the next seat as the plane flew through the (36) sky. “Yes, I suppose (37),” he replied, smiling politely, (38) continuing to read his newspaper. She glanced at her watch. It was half past eleven at night.

Janet was just about to start reading her book (39) the man picked up the briefcase and started moving to the (40) of the plane. (41), Janet stood up and started to (42) him. He opened the cockpit door(驾驶舱的门), walked inside, and then closed it behind him. Most of the passengers on the plane were (43) at that time, but those who were (44) were watching (45) that Janet made. She (46)  herself into the tiny space behind the cockpit door and (47). Seconds later the door flew open and (48) came out holding a gun. “ This is a hijack!” he shouted. “ (49),” Janet said calmly. She held her (50) to the back of his head and said, “ (51) your weapon and lie down on the floor.”

As soon as the plane had landed at the airport, Janet felt (52). A police car was waiting for them. They put the man in the car. Janet smiled at her (53) officers and said, “It’s over. Nobody was (54). What’s (55)?”

36. A. dark           B. blue         C. beautiful           D. fine

37. A. we are         B. you are       C. it is               D. this is

38. A. as             B. before        C. after              D. during

39. A. since           B. while        C. for               D. when

40. A. back           B. toilet         C. door             D. front

41. A. Suddenly       B.Quietly        C.Straightly          D. Patiently

42. A. follow          B. watch        C. seize             D. spy

43. A. reading         B. tired          C. asleep            D. talking

44. A. awake          B. interested      C. surprised         D. alert

45. A. everything       B. great progress  C. some mistakes     D. every move

46. A. ran             B. got           C. forced           D. folded

47. A. observed        B. waited         C. shot             D. aimed

48. A. the man         B. a machinist     C. a passenger       D. the pilot

49. A. Oh, it’s your turn  B. Ah, it’s dangerous  C. No, it’s not     D. Dear! How dare you

50. A. story book       B. police gun      C. briefcase         D. small knife

51. A. Drop            B. Pass me       C. Put away         D. Droop

52. A. worried         B. stressed        C. relaxed           D. impressed

53. A. following        B. proud         C. serious          D. fellow

54. A. informed        B. injured         C. organized         D. shocked

55. A. the person        B. wrong         C. the flight         D. next

查看答案
微信公众账号搜索答案