(2011年福建龙岩,18题)人体胃液中含少量HCl,正常情况下胃液的pH为0.

题型:计算题

问题:

(2011年福建龙岩,18题)人体胃液中含少量HCl,正常情况下胃液的pH为0.8~1.5,相应含HCl的溶质质量分数为0.2%~0.4%,胃酸过多与过少都不利于人体健康。某人出现反胃、吐酸水的症状,经检查其胃液中HCl的质量分数为1.495%(胃液密度约为1g/cm3).

(1)若人的胃液总量约为100mL,请完成下列表格:

正常情况下胃液中HCl的质量范围                    
该患者胃液中HCl的质量                    
该患者至少要除去的HCl的质量是                         
(2)医生给该患者开了一瓶胃舒平(每片含氢氧化铝0.39g),并要求病人每次服用2片,请根据化学方程式计算在食用该药片后被出去的HCl的质量是多少?(发生反应的化学方程式为Al(OH)3+3HCl==AlCl3+H2O)

(3)医生还提醒该胃药不宜过量服用,可能原因是                         。(答一点即可)

考点:合成有机高分子材料
题型:计算题

Are You Ready for College?

Before you send in your college applications, keep this in mind: it’s not the norm (准则) in every culture for students to go to college right out of high school.

 小题1:So if you find yourself applying for college simply because it’s the thing to do after high school, think again. Going to college right after high school may be the norm in your community, but it’s not the norm everywhere and it may not be the best decision for you.

 小题2: Yes, higher education often gives young people a big advantage in the working world, but not always. A solid technical or business school application can give you an advantage as well, and if the environment seems like a better one for you than a traditional college campus, this might be your best choice. A lot of people lead successful lives with a high school education and years of work experience.

The price of a college or university education has become a serious burden for young people and their families.  小题3: In some cases, putting off college for a year or two while a student earns money full time can make sense.  小题4:

 小题5: Almost all students suffer from homesickness, but for some students, the transition may be too much to deal with.

A.Is going to college always the best choice for high school graduates?

B.Spend some time considering your choices before sending in your applications.

C.Besides, it’s quite possible that going to college is not the right choice for you.

D.During this time, the student can take a few inexpensive classes at a community college.E. So students take massive amounts of loans, which can take decades to pay off.

F. Many young people have other choices, like military service, work experience, community service or travel.

G. The transition from high school to college is an emotional challenge for almost everybody, especially if you move away from home.

题型:计算题

男,59岁,不规则反复上腹痛3年,食欲差。突然呕血3次,每次300ml,积极治疗24小时不能止血。血压为92/52mmHg。进一步治疗宜用哪种措施()

A.注射立止血

B.雷尼替丁静脉滴注

C.胃内去甲肾上腺素灌注

D.尽快手术治疗

E.输液输血

题型:计算题

关于人造丝和蚕丝的叙述不正确的是   (    )

A.主要成分都是蛋白质

B.都是高分子化合物

C.可用灼烧的方法区别二者

D.二者成分不同,但燃烧产物相同

题型:计算题

在长度为n的有序线性表中进行二分法查找,在最坏的情况下,需比较的次数为 【2】

题型:计算题

地层岩石孔隙内液体的压力称为()。

A、静液柱压力

B、地层压力

C、井底压力

D、基岩压力

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