用化学知识解决或解释下列问题： （1）点燃篝火时，为使篝火燃烧的更旺，可以采取的

案情：赵某孤身一人，因外出打工，将一件玉器交由邻居钱某保管。钱某因结婚用钱，情急之下谎称该玉器为自己所有，卖给了孙某，得款8000元。孙某因资金周转需要，向李某借款15000元，双方约定将该玉器押给李某，如孙某到期不回赎，玉器归李某所有。在赵某外出打工期间，其住房有倒塌危险，因此房与钱某的房屋相邻，如该房倒塌，有危及钱某的房屋之虞。钱某遂请施工队修缮赵某的房屋，并约定，施工费用待赵某回来后由赵某支付。房屋修缮以后，因遇百年不遇的台风而倒塌。年末，赵某回村，因玉器和房屋修缮款与钱某发生纠纷。
问题：

       Chinese are very generous(大方的) in educating their children. Not caring about the money, parents

often send their children to the best schools or even abroad to England, the United States and Australia.

They also want their children to take extra-course activities such as musical instrument learning or ballet  

classes, or other classes. They think these will give them a good future. The Chinese believe that the more expensive an education is, the better it is. So parents will spend much unreasonable(不 理智的 ) money on education. Even poor parents will buy a computer for their son or daughter.

       However, most parents don't understand that the best early education they can give their children is

usually very cheap.

       Parents can see that their children are very good in some areas while poor in others. Parents also

can see some children are good at these skills and others do well in others. Most parents don't realize

that today's children lack self-respect and self-confidence(自信).

       The problem is that parents are only educating their children on how to take tests and how to study

well, but parents are not teaching them the most important skills that they need to be confident, happy

and clever.

       Parents can achieve this by teaching skills like cooking, sewing and doing other housework. Teaching a child to cook will improve many of the skills that he will need later in life. Cooking needs patience and

time. It is an enjoyable but difficult experience. A good cook always tries to improve his cooking, so he

will learn to work hard and finish his job successfully. His result, a well-cooked dinner, will give him much

satisfaction and lots of self-confidence.

       Some old machines, such as a broken radio or TV set that you give your child to play with will make

him curious and improve his interest. He will spend hours looking at them, trying to fix them. Your child

might become an engineer when he grows up. These activities are not only teaching a child to read a book, but rather to think, to use his mind. And that is more important.

1. What don't most parents realize today ?  

A. Education is very important to children.

B. Today's children lack self-respect and self-confidence.

C. Today's children lack of skills for tests.

D. Taking extra-courses is useful for children's future.

2. Generally speaking, children's skills __________.

A. come from their parents            

B. have nothing to do with their education

C. may be different from child to child  

D. have much to do with their marks in the exams

3. Doing some cooking at home helps children_________.

A. learn how to help their parents    

B. learn how to become strong and fat

C. learn to work hard and be full of confidence  

D. make their parents believe that they are clever

4. The writer of this passage don't agree with_______.

A. the parents' ideas of educating children    

B. the country's education system

C. the children's skills                    

D. the children's hobbies

—Must I finish the work before' clock?

—No, you _______.[ ]

A. needn't  

B. mustn't    

C. have to

D. can t

热原组织中致热活性最强的是( )。

A．脂多糖
B．蛋白质
C．磷脂
D．多肽
E．葡萄糖与蛋白质结合物

现代文化的一个鲜明特点就是以（）为基础。

A、经济

B、道德

C、高科技

D、生产力