在声明派生类时，如果不显式地给出继承方式，缺省的类继承方式是私有继承private。

若头CT示左侧基底节区片状高密度影，考虑诊断为

A．脑血栓形成

B．脑栓塞

C．脑出血

D．蛛网膜下腔出血

E．多发性硬化

氨基酸模式是指某种蛋白质中各种必需氨基酸的（）。

A.成分

B.构成比例

C.分类

D.结构

E.数量

患者，女，27岁，药物流产3次，现停经50天，查尿妊娠试验阳性， * * 出血5天，量少，色淡红，腰酸腹痛头晕眼花，心悸失眠，面色萎黄，舌淡少苔，脉细滑，治疗首选方剂是：（）

A.寿胎丸

B.举元煎

C.苎根汤

D.加味阿胶汤

E.保阴煎

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．names

B．cookies

C．software

D．extensions

预防急性乳腺炎的发生，须保持 * * 、乳晕的清洁，妊娠后期开始每天用（）清洗并涂以（）。