细菌污染输血反应的死亡率为()A．3～4% B．25～35% C．50～60% D．

据卫生部统计，2004～2005年居我国恶性肿瘤死亡率首位的是（）.

A.胃癌

B.肺癌

C.食管癌

D.肝癌

E.直肠癌

最能反映狼疮肾炎活动的指标是（）.

A.蛋白尿

B.血尿

C.肾小球硬化

D.ANA阳性

E.抗Sm抗体

根据下列句子及所给的汉语注释，写出空缺处各单词的正确形式。每空只写一词。

1. Supermarkets can't offer plastic shopping __________ (袋) to the customers for free now.

2. Sleep is __________ (必要的) to health

3. I am pleased that he gladly __________ (接受) our invitation.

4. I changed into my sports shoes so that I could walk more __________ (舒服地).

5. The patient kept __________ (咳嗽) all night.

6. During the Spring Festival, a heavy __________ (暴风雪) hit many areas across southern China.

7. Many people gathered at Tai Miao to __________ (庆祝) the 100-day countdown (倒计时) to the

    Beijing Olympic Games on the evening of April 30.

8. She has been a very __________ (勇敢的) little girl.

9. The book should be returned no __________ (迟) than next Friday.

10. Traditional Beijing opera will be __________ (增加) to the music courses in 200 schools in China.

已知在t₁、t₂温度下水的电离平衡曲线如图所示，则下列说法中不正确的是

A．t₁＜t₂

B．一定温度下，改变水溶液中c(H^＋)或 c(OH^－)的浓度，Kw不会发生变化

C．t₂温度pH值为2的HCl溶液中，水电离出的c(H^＋)=1×10^-10mol·L^-1

D．将t₁温度下0.1 mol·L^-1的盐酸稀释，溶液中所有离子的浓度均相应减小

某企业资产总额为200万元，其中发行面额为100元股票1.5万份；发行债券50万元，利率为8％，若该企业息税前盈利率为10％，所得税率为33%，求该企业的财务杠杆系数和每股盈余。