下列对水体的自然净化能力的认识正确的有（） A.人类不能利用水体的自然净化能力 B.

患者女，50岁。高热、寒战5天，意识模糊1天。既往体健。查体：T39℃，P120次／分，R22次／分，BP80/50mmHg，皮肤散在出血点和瘀斑，双肺未见异常，心率120次／分，律齐，腹软，肝肋下0．5cm，脾肋下及边。检查：Hb100g/L，WBC25.3×10⁹/L，血培养示大肠埃希菌生长，PT18秒（正常对照13秒），INR2.1，血纤维蛋白原定量108g/L，诊断为大肠埃希菌败血症，可能合并DIC。

下述检查对确诊DIC意义不大的是（）

A.复查血纤维蛋白原定量

B.复查血小板数

C.血小板功能

D.APTT

E.FDP测定

对放射线不敏感的肿瘤是

A．未分化癌

B．恶性淋巴瘤

C．鳞状细胞瘤

D．恶性淋巴上皮瘤

E．骨肉瘤

Man: Excuse me, Madam Is the air-conditioning on This room is getting as hot as a furnace.
Woman: Sorry, sir, a new epidemic called SARS is threatening us right now. As a preventative measure, we are told to let in fresh air by Opening the windows and not using air-conditioners.
Question: What does the woman mean().

A. The temperature is not as high as the man claims.

B. The room will get cool if the man opens the windows.

C. She is following instructions not to use the air-conditioning.

D. She is afraid the new epidemic SARS will soon spread all over town.

硫酸铵属于（）

A.生理酸性肥料

B.化学碱性肥料

C.生理中性肥料

D.化学酸性肥料

如图所示，两重物M₁和M₂的质量分别为m₁和m₂，两重物系在不计质量的软绳上，绳绕过匀质定滑轮，滑轮半径为r，质量为m，则此滑轮系统对转轴0之动量矩为：（）

A.A

B.B

C.C

D.D