下列哪种现象不是生物对环境的适应（  ）

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

    It's natural for all kids to worry at times, and because of personality differences, some may worry more than others. ____ They typically worry about things like grades, tests, their changing bodies, fitting in with friends, the goal they missed at the soccer game, or whether they'll be bullied (欺负), or left out. Luckily, parents can help kids manage worry and deal with everyday problems.

    To help your kids manage what's worrying them:

    Find out what's on their minds.

    Be available and take an interest in what's happening at school, on the team, and with your kids' friends. ____ As you listen to stories of the day's events, be sure to ask about what your kids think and feel about what happened. Sometimes just sharing the story with you can help lighten their load.

    ____

    Being interested in your child's concerns shows they're important to you, too, and helps kids feel supported and understood. Reassuring (令人安心的) comments can help—but usually only after you've heard your child out. Say that you understand your child's feelings and the problem.

    Guide kids to solutions.

    ____ When your child tells you about a problem, offer to help come up with a solution together. If your son is worried about an upcoming math test, for example, offering to help him study will lessen his concern about it.

    Offer reassurance and comfort.

    Sometimes when kids are worried, what they need most is a parent's concern and comfort. ____ It helps kids to know that, whatever happens, parents will be there with love and support.

已知与的和能被5整除．如果0＜a≤4，0＜b≤2，a和b的取值只有以下两种情况（　　）

材料：截至目前，我国共建立了155个民族自治地方，包括5个自治区、30个自治州、120个自治县（旗）。在55个少数民族中，有44个建立了自治地方，实行区域自治的少数民族人口占少数民族总人口的71％，民族自治地方面积占全国总面积的64％。同时，建立了1173个民族乡。
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