下列国家中人口自然增长率较高的是[ ] A．美国 B．英国 C．澳大利亚 D．印

阅读理解。

     In most parts of the world, many students help their schools make less pollution (污染). They join

"environment clubs (环境俱乐部)". In an environment club, people work together to make our

environment clean.

     Here are some things students often do.

     No-garbage (垃圾) lunches. How much do you throw away after lunch? Environment clubs ask

students to bring their lunches in bags that can be used again. Every week they will choose the classes

that make the least garbage and report them to the whole school!

     No-car day. On a no-car day, nobody comes to school in a car-not the students and not the

teachers! Cars give pollution to our air, so remember:

     Walk, jump, bike or run.

     Use your legs! It's lots of fun!

     Turn off the water! Did you know that some toilets can waste(浪费) twenty to forty m3 of water an

hour? In a year, that would fill a small river! In environment clubs, students mend those broken toilets.

     We love our environment. Let's work together to make it clean.

1. Environment clubs ask students         .

A. to run to school every day            

B. to take exercise every day

C. not to forget to take cars              

D. not to throw away lunch bags

2. From the passage we know the students usually have lunch         .

A. at school          

B. in shops        

C. in clubs        

D. at home

3. On a no-car day,          will take a car to school.

A. both students and teachers              

B. only students

C. neither students nor teachers            

D. only teachers

4. After students mend toilets, they save          .

A. a smaller river      

B. a club      

C. a lot of water      

D. a toilet

5. The writer wrote the passage to ask students to          .

A. clean schools    

B. make less pollution      

C. join clubs      

D. help teachers

针对药品市场价格不规范的现象，药监部门对部分药品的价格进行了调整，已知某药品原价为a元，经过调整后，药价降低了60%，则该药品调整后的价格为 _________ 元．

男性，36岁，因反复低热，左上腹饱胀感2个月入院，体查：中度贫血貌，全身浅表淋巴结无肿大，胸骨有压痛，肝肋下3cm，脾肋下8cm．血象WBC120×10⁹/L，分类可见中、晚幼中性粒细胞，嗜酸、嗜碱性粒细胞增多．RBC3.08×10₁₂/L．Hb85g/L，PLT58×10⁹/L，原始淋巴细胞25%。

该患者为明确诊断，最重要的检查是（）

A.血沉

B.网织红细胞计数

C.肝脾B超

D.骨髓检查

E.淋巴结活检

女，6岁半，咳嗽发热3天，体温39℃，胸片如图，最可能的诊断是()

A．右肺细菌性炎症

B．右肺结核

C．右侧胸腔积液

D．右肺脓肿

E．右下肺不张

下列哪项检测指标可显示接种乙肝疫苗的效果（　）

A．HBsAg

B．HBsAb

C．HBeAg

D．HBeAb

E．HBcAb