某患者因头晕目赤,胁痛口苦,尿赤涩痛,脉弦.舌红苔黄,医生为其开处方:龙胆.柴胡.黄

题型:单项选择题 案例分析题

问题:

某患者因头晕目赤,胁痛口苦,尿赤涩痛,脉弦.舌红苔黄,医生为其开处方:龙胆.柴胡.黄芩.栀子.泽泻.关木通.车前子.当归.生地.炙甘草,患者连续服用月后,出现四肢浮肿腰痛等症。

引起这种毒性反应的成分是()

A.柴胡皂苷

B.黄芩苷

C.龙胆苦苷

D.马兜铃酸

E.泽泻醇A

考点:中医针灸(医学高级)医学高级针灸学(正高)特训密卷六
题型:单项选择题 案例分析题

设等差数列{an}的前n项和为Sn,若a1=-15,a3a5=-18,则当Sn取最小值时n等于(  ).

A.9

B.8

C.7

D.6

题型:单项选择题 案例分析题

药厂使用电动研磨器将一批晒干的中药磨成药粉,厂长决定从上午10点开始,增加若干台手工研磨器进行辅助作业,他估算如增加2台,可在晚上8点完成,若增加8台,可在下午6点完成。问如果希望下午3点完成,需增加多少台?

A.20 

B.24 

C.26 

D.32

题型:单项选择题 案例分析题

前列腺增生直肠指诊前列腺的特征()

A.前列腺增大,中央沟变浅或消失,无压痛

B.前列腺肿胀、饱满,压痛明显

C.前列腺缩小,质坚韧,光滑,无压痛

D.前列腺弹性减弱,表面不光滑,可触及结节

E.前列腺大小正常,或稍大或稍小、硬度增加或有结节、可有压痛

题型:单项选择题 案例分析题

(12分)测定平衡常数对定量认识化学反应具有重要意义。已知:I2能与I反应成

I3,并在溶液中建立如下平衡:I2 +II3。通过测平衡体系中c(I2)、c(I)和c(I3),就可求得该反应的平衡常数。

I、某同学为测定上述平衡体系中c(I2),采用如下方法:取V1 mL平衡混合溶液,用c mol·L1的Na2S2O3溶液进行滴定(反应为I2+2Na2S2O3=2NaI+Na2S4O6),消耗V2 mL的Na2S2O3溶液。根据V1、V2和c可求得c(I2)。

(1)上述滴定时,可采用_________做指示剂,滴定终点的现象是________。

(2)下列对该同学设计方案的分析,正确的是__________(填字母)。

A.方案可行。能准确测定溶液中的c(I2)     

B.不可行。因为I能与Na2S2O3发生反应   

C.不可行。只能测得溶液中c(I2)与c(I3)之和

Ⅱ、化学兴趣小组对上述方案进行改进,拟采用下述方法来测定该反应的平衡常数(室温条件下进行,溶液体积变化忽略不计):

已知:①I和I3不溶于CCl4;②一定温度下碘单质在四氯化碳和水混合液体中,碘单质的浓度比值即是一个常数(用Kd表示,称为分配系数),且室温条件下Kd=85。回答下列问题:

(3)操作Ⅰ使用的玻璃仪器中,除烧杯、玻璃棒外,还需要的仪器是______(填名称)。

试指出该操作中应注意的事项为        。(任写一条)

(4)下层液体中碘单质的物质的量浓度是__________。

(5)实验测得上层溶液中c(I3)="0.049" mol·L1,结合上述有关数据,计算室温条件下反应I2+II3的平衡常数K=__________(用具体数据列出计算式即可)。)

题型:单项选择题 案例分析题

[A] Dr Daniel Stanley, an oceanographer, has found volcanic shards in Egypt that he believes are linked to the explosion. Computer simulations by Mike Rampino, a climate modeler from New York University, show that the resulting ash cloud could have plunged the area into darkness, as well as generating lightning and hail, two of the 10 plagues.

[B] The cloud could have also reduced the rainfall, causing a drought. If the Nile had then been poisoned by the effects of the eruption, pollution could have turned it red, as happened in a recent environmental disaster in America. The same pollution, could have driven millions of frogs on to the land, the second plague. On land the frogs would die, removing the only obstacle to an explosion of flies and lice-the third and fourth plagues. The flies could have transmitted fatal diseases to cattle (the fifth plague) and boils and blisters to humans (the sixth plague).

[C] Moses, which will be broadcast in December 2002, will suggest that much of the Bible story can be explained by a single natural disaster, a huge volcanic eruption on the Greek island of Santorini in the 16th century BC.

[D] The hour-long documentary argues that even the story of the parting of the Red Sea, which allowed Moses to lead the Hebrews to safety while the pursuing Egyptian army was drowned, may have its origins in the eruption. It repeats the theory that "Red Sea" is a mistranslation of the Sea of Reeds, a much shallower swamp.

[E] The programme tells the story of how Moses led the Hebrews out of Egypt after a series of plagues had devastated the country. But it also uses new scientific research to argue that many of the events surrounding the exodus could have been triggered by the eruption, which would have been a thousand times more powerful than a nuclear bomb.

[F] Computer simulations show that the Santorini eruption could have triggered a 600ft-high tidal wave, traveling at about 400 miles an hour, which would have been 6ft high and a hundred miles long when it reached the Egyptian delta. Such an event would have been remembered for generations, and may have provided the inspiration for the story.

[G] Fresh evidence that the Biblical plagues and the parting of the Red Sea were natural events rather than myths or miracles is to be presented in a new BBC documentary.

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