磷酸果糖激酶-1的负反馈抑制剂是
A.琥珀酸B.苹果酸C.枸橼酸D.草酸乙酸E.延胡索酸
参考答案:C
从A 、 B 、 C 、D 四个选项中,选出与所给句子画线部分意义相同或相近并能代替
的那一项。
1. The doctors and nurses in that hospital cared for patients day and night.
A. cared about
B. looked for
C. looked after
D. looked out
2. It's raining heavily outside. Why not take an umbrella?
A. hardly
B. heavy
C. hard
D. harder
3. Will you take part in the class meeting with us?
A. join in
B. join
C. come
D. spend
4. We've spoken to her dozens of times, but we still don't know her name.
A. twelve
B. many
C. a little
D. few
5.The old man also collected things such as coins, dolls or stamps.
A. liked
B. likes
C. are like
D. like
急性肾炎的病因绝大多数与下列哪种微生物感染有关
A.乙肝病毒
B.巨细胞病毒
C.β-溶血性链球菌
D.沙眼衣原体
E.葡萄球菌