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问题 单项选择题

抑制肾小管重吸收水、钠的是( )

A．心房钠尿肽
B．血管紧张素
C．醛固酮
D．抗利尿激素

答案

参考答案：A

解析： 心房钠尿肽可抑制抗利尿激素、醛固酮两种激素的分泌，促进水、钠的排泄。

单项选择题

Melissa and LoveLetter made use of the trust that exists between friends or colleagues.Imagine receiving an （） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （） . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages （） . As administrators seek to block dangerous email attachments through the recognition of well-known （） , virus writers use other extensions to circumvent such protection.Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users. Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （） access to your network.

simultaneously runs commands in the background to steal your passwords and give the（）access to your network.

A．cracker

B．user

C．customer

D．client
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选择题

以下是十月革命后苏俄在内忧外患的形势下实行的政策

有关这些政策的实施说法不正确的是(　　)。

A．有利于建立生产资料公有制

B．体现了社会主义革命的本质

C．有利于集中人力、物力、财力保障军事胜利

D．有利于建立工农联盟
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