贝克勒耳发现射线是因为底片（）。A、在未冲洗前变色 B、在无光_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

贝克勒耳发现射线是因为底片（）。

A、在未冲洗前变色

B、在无光线时感光

C、在未拍照时成像

D、在未碰触时形变

答案

参考答案：B

完形填空

完型填空。
     Look here, please! Can you see the man in black?   _1__ is Mr. Lee, my English teacher. He teaches (教) us __2  _ five days a week. He is a very good teacher. __3  _ is he? He's forty-five. He is __4  _
American. He has a car (小汽车).   _5__ yellow. Tom and Tim are   _6__ sons.   _7__ are in No.1
Middle School (一中). They can   _8__ Chinese,   _9__ they can't speak it well. Today they  _10__ at
school, because it is Sunday.

( )1. A. He
( )2. A. classes
( )3. A. What
( )4. A. a
( )5. A. Its
( )6. A. my
( )7. A. He
( )8. A. speak
( )9. A. and
( )10. A. are

  B. She
  B. English
  B. How
  B. an
  B. It's
  B. her
  B. They
  B. say
  B. but
  B. aren't

C. This
C. Chinese
C. How old
C. the
C. they're
C. his
C. We
C. tell
C. or
C. don't

单项选择题 A1/A2型题

关于产科手术的脊麻-硬膜外联合麻醉（CSEA），错误的是（）。

A.绝大部分产妇都能安全的接受CSEA

B.CSEA能提供迅速而副作用小的麻醉

C.CSEA与硬膜外具有同样的麻醉可控性

D.CSEA术后头痛发生率高

E.CSEA同样具有潜在的全脊麻的危险