企业用于公益、救济性的捐赠，在年度应纳税所得额( )以内的部分准予扣除。A．3%

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

To a router, a flow is a (1) of packets that share the same characterstics, such as traveling the same (2) , using the same (3) , having the same kind of security, and so on. A router that supports the handling of flow labels has a (4) table. The table has an entry for each Active flow label; each entry defines the (5) required by the corresponding flow label.

4（）

A．flow table

B．flow label

C．rout table

D．Tag table

某患者在心电图的表现为Ⅱ、Ⅲ、aVF导联有病理性Q波，ST段上抬0．2mV，T波倒置，应诊断为（）

A.前间壁心肌梗死

B.正后壁心肌梗死

C.亚急性下壁心肌梗死

D.陈旧性下壁心肌梗死

E.急性下壁心肌梗死

叙述鲜乳发生腐败变质的过程。

国家安全机关是（）的主管机关。

A、调查工作

B、情报工作

C、国家安全工作

D、反间谍工作

凝析油气层的电性特征表现为：电阻率曲线一般为（），声波时差幅度变化大。