题干

下列有关酶的叙述中,正确的是(    )

A:酶的成分可以是蛋白质、脂质或核酸

B:酶促反应速率与酶的浓度无关

C:有酶参与的反应能释放出更多的能量

D:DNA连接酶水解后的产物是许多氨基酸

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D

同类题1

任务型阅读

    “Urgent action required”, “Do you still want to hear from us?”, “We've updated our privacy policy”, “Should we stop sending you updates? If not, act now!”

    Many of us will have received emails like this during the past few weeks. Triggering this flood of emails is something called GDPR that comes into effect in just under two weeks' time. Often the emails warn that if you don't respond, you will be removed from the company's database, which raises a lot of questions. What action, if any, do you need to take? Could it affect you financially?

    GDPR, which stands for General Data Protection Regulation, has been described as the biggest overhaul(彻底检查)of online privacy since the birth of the internet. It is designed to give all EU citizens the right to know what data is stored on them and to have it deleted, plus protect them from privacy breaches(破坏). It comes into effect on 25 May.

    The new rules encourage the requirement for explicit and informed consent before data is processed. As a result, companies and organizations around the world are contacting users to check they are happy to carry on receiving their emails.

    However, many of us seem to be going down with “GDPR fatigue(厌倦)”: one article last week claimed that the “reconfirmation rate” - the proportion of people saying they want to continue receiving a company's emails - at UK micro-businesses was averaging just 10%, which meant “they could lose 90% of their subscribers - the life-blood for their business”. So it's no wonder some firms have adopted policies such as offering to enter people into a prize draw in return for them going in and updating their communication preferences.

    The average adult is said to have about 100 “data relationships” — companies and organizations that hold our personal data. Meanwhile, the reason why the company that occasionally emails you newsletters is now asking for your consent is perhaps because you never explicitly gave it permission to send you stuff. Maybe you only get its emails because you went to an event it organized ages ago or you once downloaded something from its website. Under the new regime, that almost certainly wouldn't count as explicit and informed consent, hence it's getting in touch now.

    The bottom line is that if it is a company or organization that you want to continue hearing from, you should probably click the button or log in to ensure you keep getting its emails. If it doesn't hear from you, it may decide to take you off its database.

Passage outline

Supporting details

The influences of

junk mails

◆ They flood into our lives.

◆ They____ to remove us from certain databases.

◆ They cause receivers to be____ about the possible risks.

The____of GDPR

◆ It will guarantee all EU citizens the____ to accept or refuse.

◆ It will require privacy ____from companies.

The ____from most receivers and the policies adopted by some firms

◆ Most receivers are____ to continue receiving such emails.

◆ Some firms hold activities so that people may win a ____ if they go in.

◆ Some firms offer to update people's communication preferences.

The reason and bottom line for companies sending such emails

◆ Companies hope to obtain explicit____ from their users.

◆ The information you left ____ doesn't mean you allow them to send you stuff.

◆ Without your reply, companies may take you off their databases.

同类题3

完形填空

    All kinds of people come in to have their shoes shined. Most folks are friendly. But this man was different.

    “How much do you make a week, boy?” he asked me. I felt he was 1 at me. He kept giving a sharp 2 around every now and then. All the time I kept 3 where I'd seen his face. Suddenly I knew. I'd seen his4in the post office many times. He was the big robber 5 by the police in three states!

    “You know,” he was saying, “it's imagination that people lack. You'll never get anywhere as a 6 boy.”

    I kept brushing away on his shoes as 7 as I could. The sooner I finished, the better. He said, “When I was sixteen, I had8 $2,500 of my own.”

    That reminded me of something. Was it $2,500 or $5,000 or $7, 500? I wasn't 9. I knew a big reward was 10 for him.

    But what could I do about it?11him with a can of shoe polish? A man of his 12 could grind (碾碎) me into the floor. If only someone would come in!

    He kept talking away. “Along with13, it takes courage. The courage to take a chance. Start something on a shoestring.”

    Suddenly I saw Officer Dailey 14 across the street. Then, real fast, I began tightening the man's shoestrings.

    The policeman was at the window when I cried out, “Officer Dailey,15! This man's a robber.”

    “16,” the man shouted angrily. He started to jump off the stand. But he didn't go the way he 17. He fell flat on his face and knocked himself out cold.

    “That was pretty 18 of you,” the officer said. “You'll get a reward of $7,500 for him.”

    “Well, it really wasn't my 19,” I said. “It was his. He told me if you had courage and imagination you could start something big on a 20.”