下列有关兴奋在神经元之间传递的叙述，不正确的是（） A.兴奋在神经元之间的传递是单向
题型：单项选择题
问题：
下列有关兴奋在神经元之间传递的叙述，不正确的是（）
A.兴奋在神经元之间的传递是单向的
B.兴奋在神经元之间的传递是双向的
C.两个神经元之间传递兴奋的结构叫突触
D.导致后一个神经元产生兴奋的物质叫神经递质
题型：单项选择题
阅读理解。
The world's shortest man, He Pingping, who was just 74.6cm tall, died in Rome on March 13, 2010 at the age of 21, where he was to take part in a TV show.
He was born in 1988 in Wulanchabu, China and was officially(官方地)
recognized as the world's shortest man in 2008.
Guinness World Records said he had made a "huge impact around the
world".
Mr He was in the Italian capital to take part in the filming of a television programme called 77ze Record Show. According to the TV production
company, he had already filmed two episodes(插曲) of the programme when he began to feel unwell.
" He started to feel ill and we decided to take him to hospital. He entered hospital two weeks ago and had all kinds of tests. Being a very special person he had to go through all sorts of tests. He went into intensive (加强) care
three days after he was admitted. "
He said that Mr He died on Saturday aftemoon, and at the request of his
family,his body would l)e returned to China to be bunied.
1. He Pingping died at the age of ____________ .
A. twentv
B. twenty-one
C. twenty-two
D. twenty-three
2. The meaning of the underlined word "impact" is -___________ .
A.影响
B.反应
C.事件
D. 力量
3. He Pingping died in __________________on March 13, 2010.
A. a TV show
B. Rome
C. an accident
D. a chest complaint
4. He Pingping took part in the filming of a television programme called_____________
A. The Record Show
B. Guin,ness World Records
C. The World's Shortest Man,
D. The China's Shortest Man,
5. Which of the following statements is TRUE?
A. He Pingping died in China on March 13, 2010 at the age of 21.
B. He Pingping was recorded in Guinness World Records.
C. When He finished filming the programme, he began to feel unwell.
D. He Pingping's family requested his body be returned to Rome to be buried.