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问题 单项选择题

已知甲醇精馏塔的回流量是14m3/h，精馏塔的入料量是13600kg/h（入料甲醇密度800kg/m3），其回流比是（）。

A、1.21

B、1.029

C、0.971

D、0.824

答案

参考答案：D

单项选择题

库内低压试验时，若22ZK跳开后，控制电压表应显示：（）V。

A、0

B、72

C、92.5

D、110
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单项选择题

This is not a diet. It’s a simple way to lose weight. And you don’t even have to give up the food you love or join a gym. You just follow some habits that thin people have. Keep them, and you’ll become thin.
(1) Wake-up
When you wake up in the morning, sit up slowly without using your hands. With legs straight out, bend forward until you feel sore in your back. It will burn about 10 calories.
(2) Start with soup
When you have a meal, order a clear soup, and have it before having the main food. In this way, you’ll feel fuller, so you’ll eat less when the main food comes.
(3) An apple ( or more) a day
Apples are full of fiber and water, so your stomach will want less. The study shows that people who eat at least three apples a day lose weight.
(4) Stand up and walk around
Every time you use the mobile phone, stand up and walk around. Heavy people sit on average two and a half hours more each day than thin people. This skill is very important as standing up and walking around will burn 50 or more calories.
Use these skills, and you will have a big weight loss.

Why does eating apples make one’s stomach want less food

A．Because apples are delicious.

B．Because apples are full of fiber and water.

C．Because apples are sour.

D．Because only apples are filled with calories.
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