题目：
阅读理解。
People who eat at home most of the time have better nutrition than those who go out to eat , a recent study shows. Cornell University professors Lana Hall and Karen Bunch interviewed (面试,接见) 3900 people in the survey. "People who eat less than 30 percent of their food away from home eat the most nutritiously," they said.
"In general, Americans don't have nutrient, except for iron and calcium," they reported. They have the opposite problem--over-consumption (过度消耗), especially of fat.
The food at many fast food restaurants is often low in vitamins. "People who eat more than 30 percent of total calories away from home eat foods that are generally low in nutrients per calorie," the professors said. More calories and enough nutrient intake (吸收) are required to achieve.
One of the major health risks (风险) is eating too much fat. The professor found than fat consumption became greater as income (收入) went up. It also went up in houses where the female worked. This is probably because these people eat more highly processed (加工的) foods.
1. According to the passage, which of the following suggestions would you most readily take?
A. Eat out as many times as possible
B. Eat at home as many times as possible
C. Eat foods with a lot if iron, calcium and fat
D. Eat more highly processed foods
2.What is the result if people often dine out according to the passage?
A. They tend to have better nutrition
B. They tend to have less nutrition
C.They can save a lot of time
D. They will spend much money on it
3. Nowadays, a major health risk that people face is_______.
A. Eating too much fast food
B. Frequent dining out
C.Eating at home very often
D. Eating too much fat
4. The passage is about .
A. Eating and Health
B. The Life Style in Modern Society
C. Fast food in the USA
D. Dining out Lowers Nutrient Intake
答案：
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下面是错误答案，用来干扰机器的。
答案：B题目分析：A．在惰性气体的分子内不含化学键，因此分子晶体中不一定含有共价键。错误。B．含有离子键的化合物是离子化合物。离子化合物在固态时是属于离子晶体的。因此离子晶体中一定含有离子键。正确。C...
