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问题 单项选择题


提供若干组考题，每组考题共同使用在考题前列出的A、B、C、D、E五个备选答案。请从中选择一个与考题关系密切的答案。每个备选答案可能被选择一次、多次或不被选择。

非竞争性抑制作用的特点是

A．Km减小，Vmax减小
B．Km增大，Vmax增大
C．Km减小，Vmax增大
D．Km增大，Vmax不变
E．Km不变，Vmax减小

答案

参考答案：E

单项选择题

Communication protocols are (66) connection-oriented or connectionless, (67) whether the sender of a message needs to contact and maintain a dialog with the recipient or (68) send a message without any, prior connect and with the hope that the recipient receives everything. (69) .These methods (70) the two ways that communication is implemented on networks.

A．fulled

B．flooded

C．depending on

D．defined by
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判断题

食品安全风险监测工作人员采集样品应当按照市场价格支付费用。
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