甲巯咪唑(他巴唑)治疗毒性弥漫性甲状腺肿的作用机制是

A．抑制TSH与甲状腺滤泡细胞的受体结合

B．抑制甲状腺球蛋白的分解

C．抑制甲状腺过氧化物酶活性、酪氨酸碘化及碘酪氨酸的偶联

D．抑制甲状腺释放T3、T4

E．抑制T4周围组织中转化为T3

Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72） . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages （73） .As administrators seek to block dangerous email attachments through the recognition of well-known （74） , 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 （75） access to your network.

A．attachment

B．packet

C．datagram

D．message