第9题
Please reorder the following sentences and form a logical paragraph. Unhealthy eating is a problem for many people. Many people are simply not aware of the nutritional value of different foods. __________ 1. Some people resort to extreme measures in an effort to control their body shape, like fad diets and pills,which can cause more problems and can be quite dangerous. 2. Therefore, the solution is to educate people about what constitutes a healthy diet. 3. That way, people will understand what they are eating. 4. consequently they become unhappy with the effect food is having on their body.
A、1-2-3-4
B、4-1-2-3
C、4-3-1-2
D、4-1-2-3
第10题
A、一般来说s键键能小于p键键能;
B、原子形成共价键的数目等于基态原子的未成对电子数;
C、共价键不具有方向性;
D、所有不同原子间的键至少具有弱极性.
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