搜题请搜索小程序“爱下问搜题”
问题 单项选择题

合成血红素的原料有（）

A.苏氨酸，甘氨酸，天冬氨酸

B.甘氨酸，琥珀酰CoA，Fe+

C.甘氨酸，辅酶A，Fe+

D.甘氨酸，天冬氨酸，Fe+

E.丝氨酸，乙酰CoA，Ca+

答案

参考答案：B

阅读理解
阅读理解。
On October 25, Liu Xiang picked up a gold medal at the 11th Chinese
National Games. He is a first Chinese hurdler to win a gold medal three
times. "I, m feeling great, Liu said. “I started to take part in the National
Games at the age of 18. Now I, m 26. I hope I can run at the Games
again in four years. "
Zhang Lili, a Chinese language teacher in Jiamusi, Heilongjiang province，was run over by a school bus as she pushed two students out of the way. After news of the accident was reported online, micro blogs were filled
with concern (关注)and admiration (钦佩)for the teacher,with one netizen (网名)calling Zhang “ the most beautiful teacher in China”.
On November 16, an overloaded (超载)school bus ran into a coal truck
in Gansu province. The accident killed at least 21 People-including 19
preschoolers (学龄前^匕童)and hurt another 43, mostly children. The
nine-seated bus was overloaded with 64 people.
1. The three passages above are most probably taken from.
A. Newspapers
B. Novels
C. Diaries
D. Books
2. What does the underlined part mean?
A. 拾起
B. 恢复
C. 顺便学到
D. 摘取
3. What can be the best title for the second passage?
A. Two pushed-away students.      
B. The most beautiful teacher in China.
C. The most beautiful bride (新娘).
D. A Chinese language teacher.
4. How many preschoolers were killed in the accident?
A.64.  
B.21.
C.19.
D.43.
5. Which is Not mentioned in the passage?
A. Zhang Lili comes from Heilongjiang province.
B. Liu Xiang joined in the National Games when he was 18.
C. The school bus accident happened in Gansu province.
D. More yellow school buses will be seen on the road in China.
查看答案
多项选择题

根据虫粮等级标准，以下害虫中（）属于主要害虫。

A、赤拟谷盗

B、咖啡豆象

C、麦蛾

D、锈赤扁谷盗
查看答案