下列生物碱中,有颜色的是() A.黄连素 B.乌头碱 C.汉防己乙素 D.咖啡因 E

题型:单项选择题 A2型题

问题:

下列生物碱中,有颜色的是()

A.黄连素

B.乌头碱

C.汉防己乙素

D.咖啡因

E.吗啡碱

考点:医学临床三基(药师)天然药物化学基本知识天然药物化学基本知识题库
题型:单项选择题 A2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.protest

B.impose

C.cover

D.restrict

题型:单项选择题 A2型题

某核素ZAX的氯化物XCl21.11g配成溶液后,需用1mol/L的硝酸银溶液20mL才能把氯离子完全沉淀下来,试计算:(1)X的质量数。

(2)若X的核内中子数为20,求 37gXCl2中所含质子的物质的量是多少?

题型:单项选择题 A2型题

公司消防安全管理的一项重点工作内容是提升各单位消防工作“四个能力”和重点防火部位人员的“四懂四会”能力,请问“四个能力”和“四懂四会”指什么?

题型:单项选择题 A2型题

领取《营业执照》的,设立登记费为多少元( )。

A.100

B.200

C.300

D.500

题型:单项选择题 A2型题

误码率是指二进制码元在数据传输系统中被传错的 【3】

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