题干

关于细胞癌变、衰老的叙述,正确的是(  )

A:癌细胞的细胞膜上糖蛋白的含量比正常细胞的多

B:多细胞生物细胞的衰老不等同于机体的衰老

C:衰老的细胞内,酶的活性降低,细胞核体积缩小

D:癌细胞与正常细胞相比,遗传物质不一定发生改变

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B

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    Good morning everyone! Today I want to talk about how to deal with our children's homework. As we know, homework is a great way for children to develop learning skills. So as parents, you should pay attention to it.

    ____

    Avoid having your child do homework with the television on or in places with different noises, such as people coming and going.

    Make sure your child has all the materials he needs.

    Ask your child if special materials will be needed for some subjects and get them in advance.____

    Help your child use time properly.

    Tell them not to watch TV unless they finish their homework in time.____Don't let your child leave homework until just before bedtime.

    When your child asks for help, provide guidance, not answers.

    Giving answers means your child will not learn the material.____At the same time, you should keep in touch with teachers, which shows your child that the school and home are a team.

    ____

    If your child has been successful in homework and is working hard, celebrate that success with a special event to make him happy.

    I am sure your child will be interested in doing homework if you take my advice.

Thank you!

A. Praise progress in homework.

B. Tell your child how important homework is.

C. Make sure your child has a quiet place to do homework.

D. For example, you should buy some paper, pencils, dictionaries and so on when you do some shopping.

E. Make a set time each day for doing homework

F. Be positive about homework.

G. Too much help is bad for your child's study.