下列是有关酶的叙述: ①将洋葱、酵母菌的细胞壁去除,需要使用纤维素酶和果胶酶 ②

题型:选择题

问题:

下列是有关酶的叙述:

①将洋葱、酵母菌的细胞壁去除,需要使用纤维素酶和果胶酶

②ATP水解酶作用对象是ATP中的高能磷酸键

③酶具有高效性,是因为酶在细胞内的含量很高

④激素和酶都不组成细胞结构,一经起作用就被灭活

⑤酶的形成一般都要经过核糖体的合成,内质网、高尔基体加工、分泌

⑥用不同种类的酶处理同一种底物的实验不能证明酶具有专一性

⑦蛋白质酶可催化蛋白质水解为氨基酸,唾液淀粉酶可催化淀粉水解为葡萄糖

⑧活的生物体的任何一个细胞都能产生酶,酶在细胞内才起催化作用。

以上说法[ ]

A.全部都不正确

B.有一个正确

C.有两个正确

D.有三个正确

考点:酶的本质与特性各种酶的作用
题型:选择题

阅读下面的短文,根据短文内容,回答下列问题。

I was a girl born with a problem in my spine(脊柱). Moving was a big problem for me. But because of my teachers and my friends, my school life was great.

My friends and I sat together. When we were free, we often played games. We often had lunch together. If I didn’t go to school that day, my friends would help me with my notes(笔记)

All my teachers were nice. My English teacher was very tall. When she entered the classroom, we would all be quiet and open our books. She would sit down and listen to me speaking English. My English improved a lot because of her help.

It was the same with my maths teacher, my science teacher and my P.E. teacher. My teachers were very nice and very sweet. They would always help me when I had a problem. They also gave me important project work and I felt happy when I finished it quickly and correctly.

I really want to show my thanks to all my wonderful teachers and friends. Without them, my school life would not have been so happy.

小题1:What would the girl’s friends do if she didn’t go to school?

____________________________________________________________

小题2:How did the girl feel when she finished her project work quickly and correctly?

____________________________________________________________

小题3:How many teachers does the girl mention (提到) in the passage? Who are they?

____________________________________________________________

小题4: What was the girl’s problem?

____________________________________________________________

小题5:What does the writer write this passage for?

____________________________________________________________

题型:选择题

女性患者,70岁。以前没有高血压和糖尿病史。活动中出现头痛伴随左侧肢体无力2小时。即往有两次脑中风史,此次脑CT检查显示右侧顶叶近大脑皮层处一个高密度影。

首先考虑的诊断是()

A.高血压动脉硬化性脑出血

B.脑膜瘤

C.类淀粉变性脑出血

D.脑梗死

E.脑栓塞

题型:选择题

猝倒神昏,口吐涎沫,四肢抽搐,醒后如常属于()

A.热极生风

B.小儿惊风

C.中风病

D.痫病

E.痹病

题型:选择题

吸收是()过程,精馏过程是()。

题型:选择题

产后出血是指胎儿娩出后24小时内出血量超过

A.200ml
B.300ml
C.400ml
D.500ml
E.600ml

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