2020——2022英语周报高二第六期答案

二、读后续写范文(满分25分)Possible version 1Paragraph 1:It was time to put an end to the Magic Marty show. I walked over. "It was fishing line. " I sneeredfolding my arms. Marty subconsciously fingered the fishing line and nervously whispered, "So, are yougoing to tell people? Seeing the panic in his eyes, somehow, I hesitated. Should I_reveal the secret, Martymight lose his new_ friends. Finally, after struggling for a moment, I replied, "Nah, I won't say anythingMarty let out a relieved sigh, and I turned to walk awayParagraph 2Waitr"Marty jumped in front of me. Unexpectedly, he patted my arm, grinning. "You' ve got a prettygood eye for magic. Want to join me? "I nodded joy fully. That's how the Magic Marty and MysteriousMatt Lunch Show began. Now we've been a magic team for three months. And since I became a fellowmagician, Marty has let me in on some of his other tricks. It turns out that instead of a fake magician, Martyis a real friend.(150 words

6.A【解析】DNA连接酶能连接两个脱氧核苷酸片段,形成磷酸二酯键,不能将单个核苷酸加到某DNA片段末端;DNA连接酶分为E· coLi DNA连接酶和T4DNA连接酶,这两种酶都能将双链DNA片段互补的黏性末端之间连接起来,其中T4DNA连接酶还可以连接平末端。故选A。

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