题干

下列除哪项外,均为内环境概念的要素           (   )

A:细胞内液

B:主要组成为血浆、组织液和淋巴

C:细胞外液

D:体内细胞赖以生存液体环境

上一题 下一题 0.0难度 选择题 更新时间:2019-07-08 07:44:29

答案(点此获取答案解析)

A

同类题1

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    On a hot summer day in America, a little boy decided to go for a swim in the old swimming hole behind his house. He dived into the cool water, Not 1that as he swam towards the middle of the lake, a crocodile (鳄鱼) was swimming toward him.

    His mother2was looking out of the window and saw the two as they got closer and closer. In great3she ran toward the water,4 to her son as loudly as she could. Hearing her voice, the little boy became 5 and made a U-turn to swim to his mother.6 it was too late. Just as he reached her, the 7reached him. From the shore, the mother 8 her little boy by the arms just as the crocodile snatched his legs. That began an incredible tug-of-war (拔河) between the 9The crocodile was much 10 than the mother, but the mother wouldn't11A farmer 12to drive by, heard their screams, raced from his truck, took aim and13 the crocodile.

    14 after weeks and weeks in the hospital, the little boy survived. His 15were extremely scarred (留下疤痕) by the attack of the animal. And, on his arms, were deep scratches (抓痕) where his mother's fingernails dug into his flesh in her effort to hang on to the son she loved.

    The newspaper reporter, who 16the boy, asked if he would show him his scars. The boy lifted his legs. And then, with obvious 17 he said to the reporter, “But look at my arms. I have great scars on my arms, too. I have them 18my Mom wouldn't let go.”

    Never judge another person's19, because you don't know 20 they were made.

同类题3

任务型阅读

Things to Remember When You're Having a Bad Day

    Even the hardest days contain lessons that will help you be a better person. Feeling down? Consider these things to remember when you're having a bad day.

    No one promised life would be perfect.

    ____Don't base your happiness on meeting every expectation you set for yourself. It is good to be ambitious, but you'll never be perfect. If you expect otherwise, your life will be filled with disappointments.

    ____

    Trees that are slow to grow bear the best fruit. Don't kid yourself into thinking success will come quickly. It isn't easy to be patient, but anything worth doing requires time____

    Without hard times, you wouldn't appreciate the good ones.

    Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to give up, that is strength____. It is hard to find much to smile about when you fail, but how else would you improve yourself? If you look at failures as a part of your growing process, you'll stay positive and follow your goals for as long as it takes.

    It's OK to cry sometimes.

    Do not apologize for crying. Without this feeling, we are only robots. Don't be afraid of crying____Instead, it is an acceptable way to let go of your depressed feelings. If you let those feelings build up without release, you'll have a much harder time dealing with them later.

A.Don't get sad if you lose.

B.It isn't a sign of weakness.

C.Success doesn't happen overnight.

D.It's not OK to worry now and then.

E.Don't compare your life with others'.

F.Remember: Rome was not built in a day.

G.If you look for perfection, you'll never be content.