以下设备中可产生空气动力噪声的是( )，可产生机械噪声的是( )。A．喷气发动机

Liu Wei is very famous in China because he can play the piano with his toes( 脚趾 ）

One day when Liu Wei was only 10 years old, he played a game with some friends .He lost both his arms because of electricity (电).

Liu Wei was very sad when both his arms were cut off after the accident .But soon he had to make a choice.

"For people like me, there were only two choices. One was to give up all the dreams. Which would cause a quick death. The other was to work hard without arms to live an excellent life." says Liu Wei.

Liu's dream was to be a pianist. His excellent life included a show on China's Got Talent and a wonderful performance playing the beautiful Marriage D'amour with his two feet on the piano.

Liu Wei learned to play the piano with his feet. And teaching himself to play the piano with his feet was very hard. Many times he wanted to give it up, but his parents went on encouraging him and he wanted to make his parents proud.

Maybe you can not believe that Liu Wei is able to play well only with his toes. The audience  (观众) were deeply moved and very excited when they watched his performance.

小题1:Why is Liu Wei very famous in China?

小题2:What did he lose at the age of ten？

小题3:Which choice did he make，to give up or to work hard？

小题4:Who encouraged Liu Wei to play the piano?

小题5:How did the audience feel when they watched Liu's performance?

男，40岁，田间劳动时右足底被割破，伤口长2cm，深达肌腱，自行包扎，10天后感乏力、畏光、咀嚼无力、下肢痛，无神经系统疾病史。查体：满面大汗，苦笑脸，张口困难，角弓反张，阵发性四肢痉挛，心肺查体无异常，腹肌强直，无压痛。

该患者早期典型的症状是（）。

A.四肢抽搐

B.畏光

C.咀嚼无力

D.全身乏力

E.张口困难

肾脏的血液供应特点是

A．血液的供应丰富
B．肾髓质血流量多而皮质血流量少
C．只经过一次毛细血管分支
D．肾小球毛细血管中血压较高，有利于分泌作用
E．肾小管周围毛细血管网中胶体渗透压低，利于重吸收

消化性溃疡最常见的并发症为（）

A.幽门梗阻

B.瘘管形成

C.穿孔

D.癌变

E.出血

下面属于变质岩构造的是（）。

A.块状构造

B.流纹构造

C.千枚构造

D.碎屑构造