已知一段信使RNA有30个碱基,其中A与C共有12个,那么转录该信使RNA的一段

题型:选择题

问题:

已知一段信使RNA有30个碱基,其中A与C共有12个,那么转录该信使RNA的一段DNA分子中应有多少个G和T以及该信使RNA经“翻译”而合成肽链时,应脱去多少个分子水,它们分别是[ ]

A.12和30

B.30和29

C.18和10

D.30和9

考点:遗传信息的翻译
题型:选择题

Shopping on the Internet is becoming more and more popular. Why do people use the Internet to shop? Some people say it is more convenient. They don't have to leave their homes to order something; they can shop for anything they want at any time; they can find things for sale that they can't find in the Mores near their homes. Still other people say they can find better prices on the Internet.

If you want to buy something on the Internet, you need a credit (信用) card. You have to type your credit card number and information on the website (网页) and send them to the store over the Internet. You have to be sure that the store will not use your information in the wrong way. You don't want someone to get your credit card number, so be careful with it, because people sometimes steal (偷) credit card numbers from stores.

TV Internet is also a good place to go window-shopping. Window-shopping is when you look at the things for sale in a store, but don't plan to buy anything. In window-shopping you can see what kinds of things you are able to get and how much they cost. Some stores like Ross Stores have a website for information about their Mores, but not for shopping. Some stores have a website for information about their stores, and you can shop on line there, such as Office Depot, Payless Shoe Source and Safeway. Some stores like Amazone.com are only for on line shopping

小题1:Some people use the Internet to shop because ______.

A.they can sleep all day long

B.they want to leave their homes.

C.they want to play with their friends

D.they can get things with less money.小题2:The Chinese meaning of the word “convenient” in this passage is “______”.

A.时髦的

B.较近的

C.方便的

D.可用的小题3:If you want to shop on the Internet, you need ________.

A.an ID card

B.a credit card

C.an IC card

D.a room card小题4:Which of the following is NOT true according to the passage?

A.You can shop on-line at www.officedepot .com

B.You can not shop on-line at www.rossstores.com.

C.You can only do window-shopping at www.amazone.com.

D.You can shop on-line at www.safeway.com.小题5:Why should we be careful with our credit card number?

A.Because it will be changed.

B.Because the store will not use your information.

C.Because we can not use your credit card when shopping.

D.Because people sometimes steal credit card numbers.

题型:选择题

设立证券公司的条件不包括( )。

A.主要股东具有持续盈利能力,信誉良好,最近2年无重大违法违规记录,净资产不低于人民币3亿元

B.董事、监事、高级管理人员具备任职资格,从业人员具有证券业从业资格

C.有完善的风险管理与内部控制制度

D.有合格的经营场所和业务设施

题型:选择题

日本与英国具有的共同地理特征是( )。

A.位于大陆西部

B.湿润多雨,适宜发展畜牧业

C.岛国,经济发达

D.平原为主的地形

题型:选择题

将牙刷沿着食物咀嚼作用中自然的流动渠道洗刷牙面的方法称

A.圆弧法

B.竖刷法

C.生理刷牙法

D.横刷法

E.擦洗法

题型:选择题

矿井水充水的形式()、涌入和溃入。

A、渗入

B、滴入

C、淋水

D、流入

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