问题 问答题 简答题

简述巧克力调温测试方法。

答案

参考答案:热变电阻调温测量计:为了检查通过调温后稳定晶型的程度,现在有一种调温测量计,可以测量巧克力中的油脂按指定的方法下冷却时产生的冷却曲线,根据记录器上的曲线图形确定调温程度。

测试方法:将调温后巧克力浆样品放在一个金属管中,一个热变电阻器探针插入巧克力样品中,置于冰水浴中,以恒定的冷却速率使其冷却。不同的调温情况可以测得三种典型的不同的调温曲线:调温不足,调温正确,调温过分,说明了三种调温状态。当巧克力中油脂固化时结晶热的析放显示出曲线斜度的变化,如果调温不足,巧克力固化时析放出十分多的热,析放的热量大大地超过了所控制的冷却速率,因而产生了第二部分的温度上升的温峰曲线;反之,如果调温过分在测试以前已经发生了很多结晶,因此在测试时产生很少的结晶热,由于结晶热的不足就不会导致温度上升的曲线斜度变化;而调温完好的巧克力所产生的结晶热与冰水中冷却所移去的热量达到平行,就可以观察到平坦的温度曲线。

单项选择题

Right is right. Right7 Of course. But is left wrong Well, the Romans used to think so. They thought left-handed people were mistakes of nature. Latin, the language of the Romans, had many words that expressed this view. Some words we use today still have this meaning. The Latin word "dexter" means "right". The English word "dexterous" comes from this word. It means "handy" (clever with hands). So, right is handy. But the Latin word for left is "sinister". The English word "sinister" comes from this word. Sinister means "evil" (very bad). Is it fair to call right-handed people handy and left-handed people evil Well, fair or not, many languages have words that express such beliefs. In old English, the word for left means "weak". That isn’t much of an improvement over "evil".

Not very long ago, children were often forced to write with their right hands. Doctors have since found that this can be very harmful. You should use the hand you were born to use.

People who use their left hands are just starting to get better treatment. But why they get all these bad names in the first place One reason may be that there are not as many left-handed people as there are right-handed people. There is one left-handed person for every five right-handed ones. People who are different are often thought to be wrong. But attitudes do seem to be changing. Fair-minded right-handed people are finally starting to give left-handed people a hand.

Which of the following is NOT right according to the article()

A. At one time, left-handed people were forced to use their right hands.

B. Left-handed people today are being treated better than those in the past.

C. There are not as many left-handed people as there are right-handed people today.

D. "Dexterous" comes from Latin, means "evil" and English "sinister" means "handy".

判断题