题干

下列有关动物细胞工程的有关说法中,正确的是(   )

A:灭活病毒通过表面的糖蛋白和一些酶与动物细胞膜上的糖蛋白作用,进而诱导融合

B:在细胞培养液中添加干扰素,以防止培养过程中的污染

C:动物细胞培养所需的气体主要是CO2,使培养基的pH值维持在7.2~7.4

D:胰蛋白酶将动物细胞膜表面的糖蛋白去掉,细胞黏着性降低,使细胞散开

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A

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阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。

    At least 40% of Australian households now have at least one home “Internet of Things” device. These are fridges, window blinds, locks and other devices that are connected to the Internet.

    While the Internet of Things (IoT) may lead to more efficiency in our daily lives, my research shows that consumers are exposed to many risks by the use of IoT devices, ranging from disclosure of private information, to physical injury and problems with the devices themselves.

    Australia has no specific laws aimed at addressing IoT issues, and current laws intended to protect consumers have gaps and uncertainties when dealing with IoT devices. Many IoT device manufacturers and suppliers show little regard for customers' privacy. Some even make money from customer data.

    Consumer electronics company Vizio recently agreed to pay US regulators US $ 2.2 million, after failing to get appropriate permission from users to track their TV viewing habits.

    Late last year, the Norwegian Consumer Council found that a children's doll recorded anything said to it by children and sent the recordings to a US company. The company reserved the right to share and use the data for a broad range of purposes.

    IoT devices have the potential to collect more private data about individuals than was possible with previous devices. All this data can then be used to study consumers, predict our behavior, and sell us products at times when our willpower is lowest. Some companies are currently using technology to track consumers through stores and send their messages to mobile phones. This may be linked to our purchase history.

    Consumers are exposed to significant risks from IoT devices, from the use of data, to security flaws and devices no longer being supported. They should think long and hard about the risks they are taking on with IoT devices. Do you really need that internet-connected hairbrush?