问题 单项选择题

可引起射血分数增大的因素有

A.心室舒张末期容积增大

B.动脉血压升高

C.心率减慢

D.心肌收缩力增强

E.快速射血期缩短

答案

参考答案:D

解析:[考点] 心脏泵血功能的评价[分析] 射血分数是每搏输出量和心舒末期容量的百分比,它是心脏泵血功能的一个重要指标。射血分数的大小,与每搏输出量和舒张末期容积有关。在本题的选答项中,只有心肌收缩力增强(D),可使每搏输出量增加,能引起射血分数增大。

单项选择题
阅读理解

Criticism(批评) never changes a thing. Accept yourself exactly as you are. Everybody changes. When you criticize yourself, your changes are negative. When you approve of yourself, your changes are positive.

Don’t scare yourself

Stop scaring yourself with your thought that it’s terrible to live this way. Find a mental image that gives you pleasure, and immediately change your scary thought to a pleasant one. Imagine a positive future ahead of you.

Be gentle, kind and patient

Be patient with yourself as you learn new ways of thinking. If you make a mistake you will develop self-hatred, but don’t hate yourself for thinking. Gently change your thoughts. Praise and support yourself.

Criticism breaks your spirit, while praise builds it up. Praise yourself as much as you can. Tell yourself how well you are doing with everything. Find ways to support yourself. Reach out to friends and allow them to help you. It is best to ask for help when you need it.

Take care of your body

Learn about nutrition. What kind of fuel does your body need in order to have enough energy and vitality(活力)? Learn about exercise. What kinds of exercise do you enjoy? Insist on doing exercise every day.

Mirror work

Look into your eyes in the mirror often and express the growing sense of love you have for yourself. At least once a day you should say to yourself: "I love you." If you have confidence in yourself, you’ll never give in to difficulty.

Love yourself. Do it now, begin now, and do the best you can.

小题1:According to the author, you should _____.

A.praise yourself now and then

B.change yourself

C.criticize someone else

D.criticize yourself小题2: The underlined phrase in paragraph 1 probably means ______.

A.to defend

B.to challenge

C.to appreciate

D.to suspect小题3:You should face the mirror and say that you love yourself so that you can _____.

A.imagine a positive future ahead of you

B.grow more confident of yourself

C.find out the expressions on your face

D.learn more about yourself