卵黄上的小白点叫胚盘，里面含有细胞核，它是（） A．小鸡_爱下问搜题

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问题选择题

卵黄上的小白点叫胚盘，里面含有细胞核，它是（　　）

A．小鸡吸收营养的部位

B．提供水分的部位

C．胚胎发育的部位

D．提供氧气的部位

答案

如图鸡卵的结构：

蛋黄即鸡卵内部发黄的部分．鸡卵中的大多数蛋白质都集中在蛋黄部分，其为胚胎发育提供营养．对卵细胞具有保护作用的有：卵壳、卵壳膜和卵白．卵黄上的小白点叫做胚盘，含有细胞核，内有遗传物质，是进行胚胎发育的部位．

故选：C

阅读理解

Zhang Lili，a young teacher from Heilongjiang，has been given the honor “the most beautiful teacher”. She risked her life to save 2 students from a highspeed bus in May，2012. She was badly injured in the accident. Her good deed(事迹)and brave acts have won great admiration from across the country. Many people have sent best wishes to her and donated(捐献) a lot of money for her treatment.

Zhu Zhiwen was born in Shangdong in 1969. A year ago，he was an unknown farmer. But now he is very famous because of his great voice. He won the first prize in the program of “I'm a Big Star”. That day，he wore an old green overcoat，so people called him “Overcoat Brother”.

He studied singing by listening to the radio. And he keeps practicing singing every morning for nearly 30 years.

Lin Shuhao，one of the most popular basketball players in NBA，is a Chinese American. He was born in 1988，in California，USA.
Lin Shuhao is known to people because of his high skill. Since February 4，2011，he has led his team to win many games. Now he is so popular on the Internet that the videos about him are being crazy spread.

根据表中信息选择最佳答案。
小题1:Zhang Lili has been given the honor “the most beautiful teacher” because __________.
A．she was badly injured
B．she risked her life to save two students
C．she has a lot of money
小题2:What’s the meaning of the word “admiration” in the passage?
A．敬佩        B．同情          C．感激
小题3:Where is Zhu Zhiwen from?
A．Heilongjiang.       B．California.       C．Shangdong.
小题4: Lin Shuhao is ______________.
A．an America teacher
B．a farmer singer
C．a basketball player
小题5: From the passage we can know ______________.
A．people have donated a lot of money for Zhang Lili’s treatment
B．Zhu Zhiwen studied singing by professional training
C．Lin Shuhao was born in China

选择题

I think you’ll find the trip_________![ ]

A. interesting

B. interested

C. be interesting

D. be interested