[简答题]All flights have been cancelled because of the snowstorm, so many passengers could do nothing but take the train.
A．暴风雪使所有航班被取消，许多乘客只能改乘火车。
B．所有的航班因暴风雪而取消，许多乘客也无法改乘火车。
C．受暴风雪影响，许多乘客坚持改乘火车，因此所有航班被迫取消。
D．由于暴风雪的影响，许多乘客不得不放弃乘坐飞机，而改乘火车。

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[单项选择]Calories
For years now, calories have been all the rage—people are counting them and cutting them, and you’d be hard-pressed to find something at the supermarket that does not list its calories per serving somewhere on the package. But have you ever wondered what exactly a calorie is
What Is a Calorie
A calorie is a unit of energy. We tend to associate calories with food, but they apply to anything containing energy. For example, a gallon (about 4 liters) of gasoline contains about 31,000,000 calories.
Specifically, a calorie is the amount of energy, or heat, it takes to raise the temperature of 1 gram of water 1 degree Celsius (1.8 degrees Fahrenheit). One calorie is equal to 4.184 joules (焦耳), a common unit of energy used in the physical sciences. Most of us think of calories in relation to food, as in "This can of soda has 200 calories." It turns out that the calories on a food package are actually kilocalories (1,000 calories=1 kilocalori
A. how much energy that food contains
B. the compilation of these three building blocks
C. how the energy is acquired
D. where does the food come from

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Calories
For years now, calories have been all the rage—people are counting them and cutting them, and you’d be hard-pressed to find something at the supermarket that does not list its calories per serving somewhere on the package. But have you ever wondered what exactly a calorie is
What Is a Calorie
A calorie is a unit of energy. We tend to associate calories with food, but they apply to anything containing energy. For example, a gallon (about 4 liters) of gasoline contains about 31,000,000 calories.
Specifically, a calorie is the amount of energy, or heat, it takes to raise the temperature of 1 gram of water 1 degree Celsius (1.8 degrees Fahrenheit). One calorie is equal to 4.184 joules (焦耳), a common unit of energy used in the physical sciences. Most of us think of calories in relation to food, as in "This can of soda has 200 calories." It turns out that the calories on a food

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[单项选择]Calories
For years now, calories have been all the rage—people are counting them and cutting them, and you’d be hard-pressed to find something at the supermarket that does not list its calories per serving somewhere on the package. But have you ever wondered what exactly a calorie is
What Is a CalorieThrough which way does the enzymes break the proteins into amino acids
A) Transportation of the molecules. C) Metabolic processes.
B) Consumption of the calories. D) The final stage of metabolism.

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