将肠淀粉酶溶液的pH值由1.8调高至12的过程中,其催化活性表现为下图的(纵坐标

题型:选择题

问题:

将肠淀粉酶溶液的pH值由1.8调高至12的过程中,其催化活性表现为下图的(纵坐标代表催化活性,横坐标代表pH值)[ ]

A.

B.

C.

D.

考点:酶的本质与特性
题型:选择题

阅读理解

     Many people like animals. Now a lot of people have animals as pets (宠物). Usually people like

to have dogs, cats, fish and other animals. Many young people have animals because they think these

animals  are interesting. Some old people have pets because they don't live with their children.Molly

lives in No.25    Garden Street. He is a doctor, but he helps dogs. People usually call him The Dog

Doctor. When their dogs get sick (生病), they call him on the telephone. He goes to the people's

houses and helps them. He gives the dogs the right medicine(药物). Wherever(无论) he goes, he is

always welcome.

1. What kind of animals do people keep?

A. Dogs.

B. Cats.

C. Fish.

D. A1l of the above.

2. Why do old people keep pets?

A. Because they don't live with their sons or daughters.

B. Because they don't have children.

C. Because they think animals are interesting.

D. Because they like animals.

3. Does Molly help animals?

A. Yes, he is.

B. Yes, he does.

C. No, he isn't.

D. No, he doesn't.

4. Which is the best title (题目)?

A. A Dog Doctor.

B. A New Pet Store.

C. Pets and Doctors.

D. An Interesting Animal.

5.Where does Molly live?

A. In a hospital.

B. In a city.

C. In a garden.

D. In No.25 Garden Street.

题型:选择题

建设项目竣工环境保护验收时,高速公路噪声监测应在公路两侧距路肩小于或等于200m范围内选取至少()有代表性的噪声敏感区域,分别设点进行监测。

A.3个

B.4个

C.5个

D.6个

题型:选择题

临时性功能夹板()

A.肌力减弱夹板通过橡皮条、弹簧、钢丝线圈辅助运动增强力量

B.肌力恢复、能主动运动后,不需用夹板

C.辅助伸腕的长对掌夹板、辅助掌指关节背伸的功能性腕手夹板

D.辅助无力的肌肉运动

E.可替代已经丧失的运动

题型:选择题

公务员受记大过处分的期间是()。

A、7个月

B、9个月

C、18个月

D、24个月

题型:选择题

工程质量监督管理办法中规定,以下哪些属于在验收测试阶段需要检查的内容()。

A.工程验收

B.工程计划书

C.操作规范

D.工程资料

更多题库