阅读理解

阅读下面短文，然后按要求做题．

　　take phrasal verbs

　　take after sb, phr. v [T not in progressive form]to look or behave like (an older relative): Mary really takes after her mother; she has the same eyes, nose and hair.

　　take off phr. v

　　1．[T](take sth, off) to remove (esp. clothes): Take your coat of f. opposite put on.

　　2．[I](of a plane, spacecraft, etc.) to rise into the air at the beginning of a flight.

　　3．[T](take sb. off) informal to copy the speech or manners of (someone), esp. for amusement; mimic: The actor made everyone laugh by taking off the members of the royal family.

　　4．[T](take sth, off) to have a holiday from work on (the stated day) or for (the stated period): I'm taking Thursday off because 1'm moving house./Take a few days off, Michael.

　　5．[I]to begin to become successful, popular, or well-known: It was at this point that her acting career really took off.

　　6．[I]informal to go away, esp. on a journey or to leave in a hurry: She just took off without saying goodbye to anyone.

　　take (sth.) over phr. v

　　[I; T]to gain control over and be responsible for (something): Who do you think will take over now that the governor has Left./I'm feeling too tired to drive any more; will you take over?

　　take to sb./sth. phr. v

　　[T]to feel a liking for, esp. at once: I took to Paul as soon as we met./I'm not sure if he'll take to the idea.

　　take sb./sth, up phr. v [T]

　　1．to begin to spend time doing; interest oneself in：John took up acting while he was at college. [+-ving]Alfred's just taken up playing the guitar.

　　2．(of things or events) to fill or use (space or time) esp. in a way that is unpleasant：The job took up most of Sunday./These boxes of yours are taking up too much space.

　　3．to continue：I'll take up the story where I finished yesterday.

　　注释：amusement n．娱乐活动　　gain vt．获得

　　mimic adj．模拟的　　responsible adj．有责任的

根据短文内容选择最佳

1．Which “take off” in the following sentences has a different meaning?

[　　]

A．I took a week off in October and I'm taking off Thanksgiving, too.

B．Everyone takes Christmas off.

C．She used to take off her teacher to make her friends laugh.

D．You need a break. Why not take a fortnight off from work?

2．Melissa ________ her father in being generous.

[　　]

3．“Today, we are to ________ Unit 11, Planting trees.” Our teacher said to us at the very beginning of the class.

[　　]

4．He will ________ my job while I ________ a week ________ for New York.

[　　]

A．take after, take…to

B．take up, take…after

C．take to, take…over

D．take over, take…off

5．I ________ her the moment I met her.

[　　]

（10分）植物具有向重力生长的特性，下列是研究根向重力生长机理的两个实验。
实验一：将空白琼脂和含EDTA的琼脂做成帽状，分别套在甲、乙两组玉米胚根的根冠外（示意图如下）。提示：EDTA的作用是去除与其临接部位的 Ca²⁺。

将胚根水平放置培养一定时间后，观察到甲组胚根向重力（下）生长，乙组胚根水平生长。根据上述实验结果，得出实验结论：                               。
　　实验二：水平放置的胚根弯曲向下生长，与根冠近地侧的Ca²⁺浓度明显高于远地侧有关。研究表明，根总是朝着Ca ²⁺浓度高的方向弯曲生长。为验证这一结论，有人设计了下列实验方案。请根据提供的实验材料和用具，写出第二步及以后的实验步骤和实验结果，并回答问题。
（1）实验材料和用具：胚根等长的萌发玉米种子，空白琼脂帽，含EDTA的琼脂帽，上面部分含Ca²⁺的琼脂帽（水平方向），培养皿等。
（2）实验步骤：
　　第一步：取若干个培养皿，在每个培养皿中放置适量的萌发玉米种子，按实验一中乙组的方法处理胚根一定时间后，移去根冠外的琼脂帽。然后将培养皿平均分成两组，编号为 A组、B 组。 
　　第二步：                                                            。
　　第三步：                                                            。
（3）实验结果：                                                         。
（4）科学家进一步证实，根冠中生长素的分布受Ca²⁺浓度影响，当胚根水平放置时，重力诱导Ca²⁺向根冠下侧移动，导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系：                                  。

补充字母，使其成为完整的单词

	F__b__ __ ar __	f__ft__ __ nth	th__rt__ __th
b__thd__y	A__g__st	__ig__th	c__nt__st
	N__v__mb__r	t__el__th	l__c__ure