问题 单项选择题

横切面韧皮部有红棕色或黑棕色分泌物,与木部相间排列呈3~8个偏心性半圆形环,髓部偏向一侧的中药材是

A.大血藤

B.鸡血藤

C.川木通

D.牛膝

E.降香

答案

参考答案:B

解析: 本题考查茎木类中药的性状鉴别。 鸡血藤:茎呈扁平的板状圆柱形或圆柱形,通常多切成椭圆形,长矩圆形或不规则的斜切片,厚0.2~3cm。栓皮灰棕色,有灰白色斑块,栓皮脱落处现红棕色。横切面韧皮部与木质部相间排列,呈3~8个偏心的环。韧皮部有红棕色至黑棕色的树脂状分泌物,木部红棕色或棕色,可见众多导管形成的小孔;髓部偏向一侧。质坚硬,气微,味涩。

单项选择题 B型题
阅读理解

阅读理解。

     Many people think of guys as being carefree when it comes to their appearance. But in fact,  a lot

of guys spend plenty of time in front of the mirror. They care just as much as girls do about their body

image.

     Body image is a person's opinions and feelings about his or her own body and physical

appearance.    1   You appreciate your body for its capabilities and accept its imperfections.

        2   Here are some ideas.

     Recognize your strengths.  Different body types are good for different things. What does your body

do well? Maybe your speed, strength, or coordination makes you better than others at a certain sport.

That may be basketball, table tennis, mountain biking, dancing, or even running.  Or perhaps you have

nonsports skills, like drawing, painting, singing, playing a musical instrument, writing, or acting.    3  

     Exercise regularly. Exercise can help you look well and feel good about yourself. Good physiques

(体形) don't just happen.    4   A healthy habit can be as simple as exercising 20 minutes to 1 hour three

days a week. Working out can also lift your spirits.

     Respect your body! Practicing good habits-regular showering; taking care of your teeth, hair, and

skin; wearing clean clothes, and so on-can help you build a positive body image.

       5   Your body is just one part of who you are. Your talent for comedy  a quick wit (智慧), and all

the other things make you unique. So try not to let small imperfections take over.

A. Use this as an opportunity to discover what you're good at.

B. Be yourself.

C. Having a positive body image means feeling satisfied with the way you look.

D. Just explore talents that you feel good about.

E. They take hard work, regular workouts, and a healthy diet.

F. The good news is that selfimage and body image can be  changed.

G. So, what can you do to develop a positive body image?