Question

l英语高来帮下！though he is considered as a great writer, （ ） .

第21题 (2.0) 分 lthough he is considered as a great writer, （ ） . A、his works are not widely read B、but his works are not widely read C、however his works are not widely read D、still his works are not widely read 第22题 (2.0) 分 Which of these two ties will you take?” “I’ll take to give me a change sometimes.” A. either B. both C. neither D. all 第23题 (2.0) 分 Very seldom（） that two clocks or watches exactly agree. A、you find B、you will find C、you do find D、do you find 第24题 (2.0) 分 Although he was so tired,（） he went to the concert with his friend that night. A、but B、so C、yet D、and 第25题 (2.0) 分 Early to bed and early to rise（） a man healthy, wealthy and wise. A、make B、had made C、makes D、will make 第26题 (2.0) 分 She seems to be too short for a（） . A、twenty-year old girl B、girl twenty-year-old C、twenty-years-old girl D、girl of twenty 第27题 (2.0) 分 By the time he was twelve, Edison（） to make a living by himself. A、would begin B、has begun C、had begun D、was begun 第28题 (2.0) 分 （）that leather shoes are hand-made, the price seems reasonable. A、In view of B、Because C、Since D、Considering 第29题 (2.0) 分 The book I（） the other day can be found nowhere. A、borrow B、borrowed C、are borrowing D、was borrowing 第30题 (2.0) 分 His eyes shone brightly when he finally received the magazine he（） . A、had long been expected B、had long expected C、has long expected D、was long expected
第31题 (2.0) 分 The moon（） to a large mirror which reflects the sun’s light to the earth. A、compares B、can compare C、can be compared D、may compare 第32题 (2.0) 分 John was so sleepy that he could hardly keep his eyes（） . A、open B、to be opened C、to open D、opening 第33题 (2.0) 分 “Where do you live?” “I live ( ) 550 Dalian Road.” A. on B. at C. to D. for 第34题 (2.0) 分 I wonder if he（） us, and I think if he（） us we’ll be able to complete the task ahead of time. A、helps; help B、will help; helps C、will help; will help D、helps; will help 第35题 (2.0) 分 I asked him to（） me a few minutes so that we could go over the problems. A、spend B、save C、spare D、share 第36题 (2.0) 分 Alice received an invitation from her boss,（） came as a surprise. A、it B、that C、which D、he 第37题 (2.0) 分 The missing boys were last seen（） near the river. A、playing B、to be playing C、play D、to play 第38题 (2.0) 分 He didn’t know what（） while he was away from home. A、would happen B、happened C、had happened D、happens 第39题 (2.0) 分 Many new （） will be opened up in the universities. A、opportunities B、realities C、necessities D、probabilities

Answer 1

CH3CH3+Br2-光照->CH3CH2Br+HBr
C2H6+2Br2-光照->C2H4Br2+2HBrC2H6+3Br2-光照->C2H3Br3+3HBrC2H6+4Br2-光照->C2H2Br4+4HBrC2H6+5Br2-光照->C2HBr5+5HBrC2H6+6Br2-光照->C2Br6+6HBr一个六个反应共9种产物
一溴代物 1种 二溴代物,2种 三溴代物 3种 4溴代物 1种 5溴代物 1种 6溴代物 1种 还有HBr 共9种 

Answer 2

21.D
22.A
23.D
24.C
25.A
26.D
27.C
28.D
29.A
30.A
31.C
32.A
33.B
34.B
35.C
36.C
37.A
38.C
39.B

Answer 3

AADCCACDBBCABBCCAAA
自己排序

Answer 4

B

Answer 5

21.D
22.A
23.D
24.C
25.A
26.D
27.C
28.D
29.A
30.A
31.C
32.A
33.B
34.B
35.C
36.C
37.A
38.C
39.B