题目内容
DNA是生命体的主要遗传物质。绝大多数生命体可以自主完成遗传物质的合成，试以大肠杆菌为例，总结DNA的复制一般过程，并分析DNA复制的基本规律。
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Listen to the recording and fill in the missing blanks.I wish to take this opportunity to ____(1)____ you on behalf of all my ____(2)_____for your warm _____(3)_____ and incomparable ____(4)______. The past ___(5)____ days in China have been truly ____(6)____ and enjoyable, and most ____(7)_____. I hope that I will be your ___(8)____ in my country in the near _____(9)_____. Here, I particularly want to pay _____(10)_____ to our Chinese ____(11)_____ whose _____(12)____ has made possible the ____(13)_____ conclusion of the cooperative ______(14)_____. May I ask all of you present to join me in raising glasses to the _____(15)_____ and _____(16)______ for our two companies?[音频]
直流电源多数是将交流电经过、 、和 后获得
电路用来将交流电压变换为单相脉动的直流电压
listen to the following sentences and write down the logic link used in the sentence, and point out the category to which the logic link belongs.For example: After you hear the sentence"Sheraton should be pretty good. But what's the itinerry like?", you are asked to write down the logic link in the first blank 1. but,and write down the category in the second blank 2. 转折关系Now you're going to hear the first sentence. After hearing the sentence, write down thethe logic link used in the sentence, and point out the category to which the logic link belongs on the following blanks.1______________ 2_________________[音频]
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