作业管理的核心是（）。A.作业分析 B.成本动因分析 C.作业业绩计量评估 D.作业

下列各项中，不属于负债类的科目的有（）。

A.短期借款

B.应付账款

C.实收资本

D.预付账款

含生物碱类成分的药材有（）

A.山茱萸

B.巴豆

C.马钱子

D.吴茱萸

E.枸杞子

饭后不能立即从事剧烈的体育运动，是因为（　　）

A．对消化有抑制作用

B．会使平滑肌疲劳

C．影响小肠的吸收

D．会患肝炎

在关系数据库系统中，当关系的型改变时，用户程序也可以不变。这是

A．数据的物理独立性

B．数据的逻辑独立性

C．数据的位置独立性

D．数据的存储独立性

Government officials reported three new cases of mad cow, bringing the total so far this year to 99. Last year, France recorded just 31 cases of the mad cow disease. The rising numbers are in part (1) a new testing program that focuses on cows that are most (2) . That program has (3) 39 cases. But still 60 new cases were identified in the usual way, (4) were found in 1999. Many scientists (5) that this year, five years after safety precautions were (6) , the number of cases would be (7) .

The rise in cases has (8) some scientists to question whether the disease can be transmitted in ways not yet understood. Scientists are still (9) the disease, first recognized in cows in 1986.

It appears that it is not caused by a bacteria, virus or fungus, but (10) infectious particles called prion, perhaps (11) a virus or other agent. The disease kills cells in the brain, (12) it spongy and full of holes.

France has taken more steps to (13) safety than most European countries, (14) refusing to take English beef (15) the European Union. But some scientists believe that France has not been (16) in imposing the ban on feed that (17) animal pans.

Some French officials hope that the sudden interest in mad cow disease will mean that French consumers will become educated about it, thereby recognizing that French beef is actually (18) controlled. Every cow is given a passport at birth, and extensive information about its parentage and (19) it was raised must be (20) to any slaughterhouse. When a diseased animal is found, the entire herd is destroyed.

3（）

A.discovered

B.invented

C.identified

D.disclosed