27.He glanced over at her, ____that though she was tiny, she seemed very well put together.
A.noting B.noted C.to note D.having noted
26.As an athlete, nothing comes _____Jim and his morning exercise.
A.out B.between C.with D.among
25.As soon as he comes back, I’ll tell him when ________and see him.
A.you will come B.will you come
C.you come D.do you come
24.-----My brother failed in business.
-----_____.
A.I am certain he’ll make it. B.That’s really tough.
C.Everything is going well with me. D.Actually, there is no choice anyway.
23.The flight attendant welcomed us ___ the plane.
A.abroad B..aboard C.board D.broad
22.______, a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of English is poor.
A.Other things being equal B.Other things be equal
C.To be equal to other things D.Other things to be equal
第一節:單項填空(共15小題;每小題1分,滿分15分)從A、B、C、D四個選項中,選出可以填入空白處的最佳選項。
21.-----Shall we go to the art exhibition right away?
-----_____.
A.It’s your opinion. B.I don’t mind.
C.It’s all up to you. D.That’s your decision.
53.實驗是生物學學習的一項重要內容,結合所學實驗分析回答下列問題。
(1)在“DNA與RNA在細胞中的分布”實驗中,所有的染色劑是 ,選用8%鹽
酸的作用是 。
(2)分離獲取細胞質中各種細胞器的方法是 ;制備細胞膜時,所采用的方法
叫做 。
(3)Grimton曾觀察到:饑餓的原生動物的粗面內質網減少,或幾乎完全消失,高爾基
體的形成停止,由于這些細胞于實驗期間還繼續形成分泌小泡,所以每一個高爾基
體的囊的數目減少了,但當給動物重新喂食后,形成了新的粗面內質網,同時產生
新的高爾基體,囊的能力也恢復了。高爾基體的構建和數目變化為什么與內質網一
致呢?
①你的假說: 。
②實驗設計與實施: 略。
(4)在歐美,洋蔥被譽為“蔬菜皇后”。其肥大的鱗莖中含糖類、維生素及各種礦質元素
等,是不可多得的保健食品。那么洋蔥肥大的鱗莖中所含的糖是淀粉還是還原糖?
某生物學興趣小組的同學以此作為研究課題。請你完成下面的實驗研究報告。
①實驗目的:探究洋蔥肥大的鱗莖中所含的糖是淀粉還是還原糖。
②實驗原理:
a.
b.
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