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. New economy online People are talking about the “new economy”. It’s very different from the “old economy”. In the old economy, people travel to walk. They buy things in stores. They use the post office, the fax and the telephone to send information. They see people face-to-face at their jobs or in stores. People get information from newspapers, radio, television, books and libraries. In the new economy, people do business through the “net”, which is a connection of millions of computers everywhere in the world. In the new economy, workers often work at home. They can get information online. They can communicate with employers and co-workers by e-mail . Businesses have “virtual(虚拟的)stores”. They are websites on which customers can see the products. Business can sell to customers anywhere in the world. In the new economy, people live a fast paced, convenient and colorful life. The whole world develops more quickly than before. But the new economy is double-edge sword(双刃剑).Its disadvantage is also obvious. For example, the Internet has led to a huge increase in credit care(信用卡)cheating. Some illegal websites offer some cheap or banned(禁止的) goods or services. Online shoppers who enter their credit card information may never receive the goods they want to buy and their card information could even be for sale in an illegal website. So people in the new economy should be smarter and knowledgeable. 68.The cause of the differences between the new economy and the old economy is ______. A. the change of people’s idea      B. the business people do C. the use of the Internet          D. the change of people’s life 69.In the old economy, people can do the following things EXCEPT______. A. getting information from books B. communicating with friends by telephone C. meeting people face to face D. shopping online 70.“But the new economy is a double-edge sword.” in the last passage means______. A. the new economy is as sharp as a sword B. the new economy has advantages and disadvantages C. the new economy is better than the old economy D. both the new economy and the old economy have disadvantages 71.Which of the following is NOT true? A. People can get all kinds of information on the Internet. B. Telephone, radio, television, newspapers and so on will disappear in the new economy. C. People in the new economy should have high quality. D. Life in the new economy is more comfortable than the one in the old economy.
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参考答案:
举一反三
【单选题】关于蛋白质结构,下列( )说法是不正确的
A.
相邻的肽键往往不在一个平面上
B.
二级结构中螺旋方向有两种
C.
辅基只存在于四级结构中
【判断题】连续型随机变量可在某一个或多个实数区间内取任意值,其取值个数无穷多,无法逐一列出,可用概率密度曲线函数描述和呈现其概率分布规律。
A.
正确
B.
错误
【单选题】《中华人民共和国劳动合同法》第19条规定:“劳动合同期限三个月以上不满一年的,试用期不得超过一个月;劳动合同期限一年以上不满三年的,试用期不得超过两个月;三年以上固定期限和无固定期限的劳动合同,试用期不得超过六个月。”关于这个条文,下列哪一选项是错误的?
A.
该条规定不属于法律原则
B.
该条规定属于法律规则中授权性规则
C.
该条规定对于签订劳动合同的劳动者与用人单位具有指引作用
D.
审理劳动合同纠纷的仲裁员可以根据该条规定判断劳动合同的相关条款合法还是违法、有效还是无效,就此而言,该条规定具有评价作用
【单选题】作用于细菌核蛋白体30S亚基,抑制蛋白质合成的是
A.
青霉素G
B.
四环素
C.
氯霉素
D.
多粘菌素B
E.
万古霉素
【单选题】作用于细菌核蛋白体30S亚基,抑制蛋白质合成的是()
A.
青霉素
B.
四环素
C.
氯霉素
D.
多黏菌素
E.
万古霉素
【单选题】关于蛋白质分子结构,下列说法中正确的是
A.
一级结构即氨基酸排列顺序
B.
维持一级结构的主要化学键是二硫键
C.
二级结构比一级结构氨基酸排列顺序更复杂
D.
二级结构包括螺旋、转角、模体、卷曲四种类型
【单选题】作用于细菌核蛋白体30S亚基,抑制蛋白质合成的是
A.
青霉素G
B.
四环素
C.
多黏菌素
D.
庆大霉素
【多选题】关于四级结构蛋白质的正确说法是:
A.
由两条或两条以上多肽链组成
B.
血红蛋白有两个α亚基、两个β亚基
C.
胰岛素具有四级结构
D.
血红蛋白具有四级结构
【单选题】《中华人民共和国劳动合同法》第19条规定:“劳动合同期限三个月以上不满一年的,试用期不得超过一个月;劳动合同期限一年以上不满三年的,试用期不得超过二个月;三年以上固定期限和无固定期限的劳动合同,试用期不得超过六个月,”关于这个条文,下列哪一选项是错的?()
A.
该条规定不属于法律原则
B.
该条规定属于法律规则中的授权性规则
C.
该条规定对于签订劳动合同的劳动者与用人单位具有指引作用
D.
审理劳动合同纠纷的仲裁员可以根据该条规定判断劳动合同的相关条款合法还是违法、有效还是无效,就此而言,该条规定具有评价作用
【单选题】关于蛋白质的四级结构下列说法哪种是正确的()
A.
依赖肽键维系四级结构的稳定性
B.
在三级结构的基础上,由二硫键将各多肽链进一步折叠、盘曲形成
C.
每条多肽链都具有独立的生物学活性
D.
由两条或两条以上具有三级结构的多肽链组成
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