大肠杆菌DNA聚合酶I催化功能有（）、（）和（）。用蛋白水解酶作用DNA聚合酶I，可

发布时间：2017-09-26 00:11 │ 来源：www.tikuol.com

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问题：

大肠杆菌DNA聚合酶I催化功能有（）、（）和（）。用蛋白水解酶作用DNA聚合酶I，可将其分为大、小两个片段，其中（）片段叫Klenow，具有（）和（）作用，另外一个片段具有（）活性。

考点：化学工程 DNA的生物合成（复制）DNA的生物合成（复制）题库

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用RSA算法加密时，已知公钥是(e=7，n=143)，私钥是(d=103，n=143)，用公钥对消息M=4加密，得到的密文是______。

A．59
B．82
C．137
D．16384

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完形填空。
It was her giggling that drew my attention.Note taking really wasn't all that funny. Walking over to the offender, I asked for the__1__.Frozen, she refused to give it to me.I waited, all attention in the classroom on the quiet__2__between teacher and student.When she finally__3__it over she whispered, "Okay, but I didn't draw it." It was a handdrawn__4__of me, teeth blackened and the words "I'm stupid" coming out of my mouth. I managed to fold it up calmly.My mind,__5__, was working angrily as I struggled not to__6__.I figured I knew the two most likely candidates for drawing the picture.It would do them some__7__to teach them a lesson, and maybe it was high time that I did it! Thankfully, I was able to keep myself__8__. When there were about six minutes remaining, I showed the class the picture.They were all silent as I told them how__9__this was for me.I told them there must be a reason__10__and now was their chance to write down anything they needed to tell me.Then I let them write silently while I sniffed in the back of the classroom. As I__11__the notes later, many of them said something like, "I've got nothing against you," or "I'm sorry you were hurt." Some kids said, "We're__12__of you." But two notes, from the girls who I__13__ were behind the picture, had a list of issues.I was too__14__, too strict… Reading those notes, I realized that over the course of this year, instead of__15__my students, I had begun commanding them to__16__.Where I thought I was driving them to success I was__17__driving them away. I had some apologizing to do.But the next day in the classroom, one boy and one girl each handed me a card.The one__18__by all the boys expressed sincere regret for the ugly joke.The one from the girls asked for__19__. This was a lesson for both the kids and me.Forgiveness does not change the past, but it does enlarge the__20__.
( )1．A.note ( )2．A.battle ( )3．A.took ( )4．A.statue ( )5．A.otherwise ( )6．A.leave ( )7．A.good ( )8．A.amused ( )9．A.meaningful ( )10．A.aside ( )11．A.wrote ( )12．A.proud ( )13．A.figured ( )14．A.talkative ( )15．A.forcing ( )16．A.appreciate ( )17．A.actually ( )18．A.decorated ( )19．A.thankfulness ( )20．A.friendship	B．advice B．competition B．thought B．graph B．however B．cry B．harm B．controlled B．forgetful B．above B．finished B．fond B．promised B．mean B．encouraging B．apologize B．normally B．offered B．forgiveness B．education	C．reason C．argument C．turned C．picture C．therefore C．explain C．favor C．uninterested C．regretful C．beneath C．read C．afraid C．concluded C．clumsy C．comforting C．compromise C．immediately C．signed C．compensation C．knowledge	D．help D．conversation D．handed D．poster D．besides D．argue D．punishment D．relaxed D．hurtful D．behind D．collected D．ashamed D．confirmed D．considerate D．teaching D．achieve D．generally D．bought D．communication D．future

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小丽实验操作模拟考试的专题是：用碳酸钠溶液鉴别稀盐酸、食盐水和澄淸石灰水．

【进行实验】

【思考与分析】应先对废液中的溶质成分进行探究，后制定方案．

【实验与探究】

（1）小丽将所有废液倒入一洁净烧杯中，静置后得到上层清液；

（2）取少量清液加入足量的氯化钙溶液（中性），再滴加几滴无色酚酞试液，若出现__________的现象，说明上层清液中一定有碳酸钠和氢氧化钠，一定没有_________（填离子符号）．

【方法与应用】通过以上探究，处理上述废液的正确方法是_____________．

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液体制剂生产各工序往往是（），中间品不需要另设贮存，而是（），定点抽样检测监控。

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在成组设计两样本比较的秩和检验中，如编秩次时遇实测值相同，但分属于两组，则应

A．依顺序编秩
B．弃去不计
C．以实测值作为秩次
D．与邻近数值合并，再重新编秩
E．取其平均秩次

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