搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列关于胸膜腔的描述错误的是（）

A.胸膜腔是一个潜在的开放腔隙

B.胸膜腔内为持续负压

C.吸气时胸膜腔内负压增大

D.正常人胸膜腔内也有少量液体起润滑作用

E.胸膜腔内压力是促进胸腔内静脉血和淋巴液回流的重要因素

答案

参考答案：A

单项选择题

单相全波整流X线机，高压整流器的个数是

A．12

B．10

C．8

D．6

E．4
查看答案
阅读理解
阅读理解。
      It's summer movie time again. And heroes are ready to try their strength and magic on the silver screen.
Check out our list of four films that look most promising to young audience.
      Harry potter and the Prisoner of Azkaban
      Release Date: June 4
      Story: It's the summer before Harry Potter's third year at Hogwarts School of Witchcraft and
Wizardry. A shadow is hanging over Hogwarts. A dangerous murderer, Sirius Black, has escaped
the Wizards' Prison. And he broke out to fulfill one task to kill Harry Potter.

      Around the World in 80 Days
      Release Date: June 16
      Story: This version of the classic novel set in 1872 focuses on Passepartout ( Hong Kong actor
Jackie Chan), a Chinese thief who seeks refuge with a strange London adventurer, Phileas Fogg.
Passepartout uses his martial arts skills to defend Fogg from danger as he travels around the world
in 80 days to win a bet.

       Spider-Man 2
       Release Date: June 30
       Story: Peter Parker is still coming to terms with his dual (双重的) identity as the crime superhero
Spider-Man. He wants to reveal his secret identity to Mary Jane: meanwhile, his aunt May has fallen on
hard times. A new villain (坏人), Dr Otto Octavius, has appeared to cause more troubles.

       King Arther
       Release Date: July 7
       Story: King Arthur is presented as a clever ruler who manages to unite all the knights (骑士) in
Britain after the fall of the Roman Empire. Under the guidance of Merlin and the beautiful, brave
Guinevere, Arthur will struggle to realize his dreams
1. According to the passage, if you want to see a film whose leading actor is Jackie Chan, you will see the
    film on ______.
[ ]
A. June 4
B. June 16
C. June 30
D. July 7
2. In Spider Man 2, Aunt May's trouble is caused by ______.
[ ]
A. Peter Parker
B. Mary Jane
C. Dr. Otto Octavius
D. Spider-Man
3. Which of the following films is set in ancient Britain?
[ ]
A. Harry Potter and the Prisoner of Azkaban.
B. Around the world in 80 Days.
C. Spider-Man 2
D. King Arthur
查看答案