資訊推薦

• 4．下列有关基因工程中限制性内切酶的描述，错误的是(A) 一种限制性内切酶只能识别一种特定的脱氧核苷酸序列(B) 限制性内切酶的活性受温度影响(C) 限制性内切酶能识别和切割RNA(D) 限制性内切酶
• 26. We are interested in the weather because it _____ us so directly.[(A)] benefits [(B)] affects [(
• 17. Mr. Zhang, _____ came to see me yesterday, is an old friend of my father’s.[(A)] which [(B)] tha
• 3．图中三条曲线分别代表了动物物种多样性程度、动物数量易变程度及冬眠动物比例在不同类型生态系统中的变化趋势。代表动物物种多样性程度和数量易变程度的曲线依次是(A)①②　　　　　 (B)②③(C)①③　
• 27. Janet, _____ was read by the teacher, is a top student in our class.[(A)] the composition of her
• 18. We plan to increase the output of the machine _____ 7.4 percent this year.[(A)] at [(B)] in [(C)
• 28. Hardly had he entered the classroom _____ the bell rang.[(A)] than [(B)] then [(C)] when [(D)] s
• 19. I don’t mind _____ out for a walk in such bad weather.[(A)] go [(B)] to go [(C)] going [(D)] gon
• 29. I would rather you _____ to the party with her.[(A)] go [(B)] went [(C)] will go [(D)] has gone
• 20. As a lawyer he spent a lot of time _____ investigations.[(A)] conducted [(C)] conduct[(B)] to co
• 阅读下面的文字，完成1~3题老子其人其书的时代，自司马迁《史记》以来只有异说，清代学者崇尚考据，对此议论纷纷，如汪中作《老子考异》，力主老子为战国时人，益启争端。钱穆先生说：“老子伪迹不彰，真相大白，
• 30. His English was so poor that he found it difficult to make himself _____.[(A)] understood [(C)]
• 21. The new invention is to make our daily life easier, _____ it more difficult.[(A)] not to make [(
• 31. The sun heats the earth, _____ makes it possible for plants to grow.[(A)] that [(B)] where [(C)]
• 32. Little _____ that the police are about to arrest him.[(A)] does he know [(C)] he doesn’t know[(B
• 42. I didn’t see him at the meeting yesterday afternoon. He _____ it.[(A)] mustn’t attend [(C)] woul
• 33. It’s high time we _____ something to stop road accidents.[(A)] are doing [(B)] did [(C)] will do
• 43. I think there’s no comparison between the two cars, one _____ clearly far better than the other.
• 【題組】52. Who will most probably take care of the middle-aged Americans when they need care themselves
• 34. This is the best novel _____ I have ever read.[(A)] which [(B)] where [(C)] that [(D)] what
• 【題組】62. It was most probable that Dr. Ginoux was ________.[(A)] a member in that organization[(B)] a
• 44. Many of his novels are reported _____ into several foreign languages last year.[(A)] to be trans
• 【題組】53. All caregivers believe that they can __________.[(A)] care for their elderly parents better
• 35. It’s necessary that the problem _____ in some way or other.[(A)] is settled [(C)] be settled[(B)
• 【題組】63. When she was filling the application forms, Dr. Ginoux began to be _______.[(A)] realistic [