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问题 单项选择题

有关腹股沟斜疝的处理错误的是

A．1周岁以下的婴儿可应用保守治疗

B．12小时以内的嵌顿疝，可行手法复位

C．疝修补术不适合绞窄性斜疝

D．婴幼儿斜疝需行疝囊高位结扎术

E．手术的目的是消除腹腔内脏突出的空间，加强腹壁薄弱区

答案

参考答案：B

单项选择题

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．cracker

B．user

C．customer

D．client
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单项选择题

JO2、JO3、JQO2系列电动机的启动转矩一般为额定转矩的（）倍。

A.1.8～2.0；

B.1.5～2.0；

C.1.8～2.5；

D.2。
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