试题与答案

在下列的例子中,你会不会过高或过低估计被测食品的水分含量?为什么?

题型:问答题 简答题

题目:

在下列的例子中,你会不会过高或过低估计被测食品的水分含量?为什么?

答案:

参考答案:

(1)热空气干燥时:

A.样品颗粒形状太大

B.含高浓度挥发性风味化合物

C.样品具有吸湿性

D.表面硬皮的形成

E.含有干燥样品的干燥器未正确密封

(2)甲苯蒸馏法:

A.样品中水和溶剂间形成的乳浊液没有分离

B.冷凝器中残留水滴

(3)卡尔费休法:

A.天气非常潮湿时称量起始样品

B.样品研磨得非常粗糙

C.食品中富含维生素C

试题推荐
题型:填空题

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.percussive

B.excessive

C.productive

D.recessive

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