已知命题P：∀x∈R，x＞sinx，则P的否定形式为（ ） A．P：∃x∈R，x≤
题型：选择题
问题：
已知命题P：∀x∈R，x＞sinx，则P的否定形式为（ ）
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题型：选择题
阅读理解
Einstein died in 1955. He was one of the greatest man in the world . His idea lived on in the work of
scientists. After Einstein died ,his brain was removed (移动) by Dr Thomas Harvey, a hosp
ital surgeon (外科医生) in charge(管理)of examining the scientist's body . He decided to examine his brain .But
Einstein's family didn't agree it.
Strangely, Dr Harvey disappeared(消失) soon afterwards ,taking the brain with him. No one knew
where he had gone . People tried to find him over 20 years .At last ,the brain was examined by scientists.
It was found that the brain was slightly smaller than normal (标准) ,but up to 15% wider and with few
creases (皱折) .It maybe make Einstein famous in the world.
1. What's the meaning of 'slightly' in the article ?
A. a little
B. a few
C. much
D. even
2. _________found the mystery (秘密)of Einstein's brain.
A. Dr Har
vey
B. Scientists
C. His family
D. A hospital surgeon
3. What differences between Einstein's brain and others'.
A. smaller, wider and with few creases
B. bigger ,wider and with few creases
C. smaller and with more creases
D. bigger and wider
4. _________ made Einstein very famous in the world ?
A. Scientists
B. His work 
C. His interests
D. His special brain
5. __________ was the first one to examine Einstein's brain .
A. His family
B. Dr Harvey.
C. His friends
D. Scientists