用括号内所给单词的适当形式填空。

1. This cake is very ________ (nice), but that one is ________ (nice) than this one.

2. Living in the country is much ________ (exciting) than living in the town.

3. All of us need ________ (study) hard .

4. Which goes ________ (quickly), the bus or the car?

5. Who is ________ (young) in your class?

6. A cow is much ________ (big) than a sheep .

7. The new book is ________ (easy) than the old one .

8. This park is________(beautiful) of all .

9. Uncle Wang is very ________(friend) and________(help). He often helps us.

10. Which do you like ________(well), cats , dogs or chickens?

通过定量风险评价确定的重大危险源的个人和社会风险值，（）规定的个人和社会可容许风险值标准

A.小于

B.等于

C.不得超过

D.不得小于