可引起肢端溶骨症的化合物是() A.氯乙烯 B.丙烯睛 C.氯气 D.四氟乙烯 E.

题型:单项选择题 A1型题

问题:

可引起肢端溶骨症的化合物是()

A.氯乙烯

B.丙烯睛

C.氯气

D.四氟乙烯

E.正已烷

考点:广西公共卫生住院医师规范化培训职业卫生与职业医学职业卫生与职业医学题库
题型:单项选择题 A1型题

Perhaps, every county suffered from inflation once or more times. Inflation is an economic condition in (B1) prices for consumer goods (B2) , and the (B3) of money or purchasing power decreases. There are three causes of inflation. The first and most important cause may be excessive government spending. For example, in order to (B4) a war or carry (B5) social programs, the government may spend more money than it has received through taxes and other revenues, thus creating a deficit. In order to (B6) this deficit, the Treasury Department can simply (B7) the money supply by issuing more paper money to (B8) the debts of government. This increase in the money supply will cause the value of the dollar to (B9) decrease. The second cause of inflation occurs when the money supply increases faster than the supply of goods. (B10) people have more money, they will run out to buy popular goods (B11) televisions and computers, for example, and a shortage will result. Industry will then produce more, at higher prices, to (B12) demand. (B13) , if people think that the prices of popular goods are going up, they will buy and even borrow money at high (B14) rates to pay for them. Finally, if labor unions demand that workers’ wages (B15) or (B16) the high cost of living, industry will meet this demand and add other costs of production on the (B17) . (B18) summary, all of these causes can (B19) inflationary problems that can affect the welfare of a nation. However, of these three causes, (B20) government spending may be the most important.

A.automatically

B.timely

C.exceedingly

D.excessively

题型:单项选择题 A1型题

如图:一罐刚开启的雪碧饮料,请回答:

(1)饮料成分中属于有机物的是(填序号)           

(2)从罐内冒出大量的气泡,该现象说明             

题型:单项选择题 A1型题

Ⅰ.小明设计了下图1所示的实验装置,进行一氧化碳还原氧化铜的实验。试回答:

(1)该装置的不足之处是                  

(2)实验开始时,先要进行的操作是                 (选填序号:①加热 ②通一氧化碳)。

(3)实验过程中,B处反应的化学方程式是                                 。

Ⅱ.为分离A装置中反应排出的一氧化碳和二氧化碳,小明又设计了下图2所示的装置(铁架台、铁夹等固定用装置已略去,a、b为活塞)。

(1)当关闭活塞b,打开活塞a时,可分离得到               (写化学式,下同)。

(2)然后关闭活塞a,再打开活塞b,又可分离得到                

Ⅲ.对于A装置中反应后得到的红色固体(此时氧化铜已全部反应完),小明进行了以下探究。

【查阅资料】

①氧化铜经一氧化碳还原不仅能生成铜,还可能生成中间产物氧化亚铜(化学式为Cu2O)。

②Cu2O是不溶于水的红色固体,在酸性溶液中,可发生反应生成Cu2+和Cu。

【提出猜想】氧化铜经一氧化碳还原所得到的红色固体中除Cu外还可能含有Cu2O。

【进行实验】小明设计了一个最简单的实验方案。

题型:单项选择题 A1型题

细胞膜的跨膜物质转运功能中,“带电的离子可由通道介导进入细胞”属于()

A.单纯扩散

B.易化扩散

C.主动转运

D.被动转运

E.引起兴奋的条件

题型:单项选择题 A1型题

甲胎蛋白阳性时,对下列疾病最有诊断意义的是()

A.慢性活动性乙型肝炎

B.原发性肝癌

C.肝转移癌

D.原发性肝内胆管细胞癌

E.肝硬化

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