一商家销售某种商品的价格满足关系P=7-0.2x（万元／吨），其中x为销售量，该商品

药物所含挥发油的散失，导致气味变化，称为（）。

A.泛油

B.霉变

C.虫蛀

D.气味散失

E.溶化

患者，女，26岁。每值月经来潮时就出现腹部刺痛，血块甚多，颜色紫黑。首选药组是（）

A.大蓟、小蓟

B.桂枝、牡丹皮

C.艾叶、炮姜

D.蒲黄、五灵脂

E.生地黄、白芍

市场缺陷是指( )。

A．市场发育不健全、不成熟
B．市场机制的调节的局限性
C．市场机制的无效
D．市场壁垒

Most computer systems are (165) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (166) to an outsider attack by preventing (167) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (168) users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually (169) by tools referred to as Intrusion Detection Systems.

A．visit

B．access

C．I/O

D．read/write

下列选项中，（）是以直观感知为主的驾驶教学方法

A.演示教学法

B.自学辅导教学法

C.讨论教学法