再生障碍性贫血、巨幼细胞性贫血可导致（）慢性病贫血，肾性贫血

搜题请搜索小程序“爱下问搜题”

问题配伍题

再生障碍性贫血、巨幼细胞性贫血可导致（）
慢性病贫血，肾性贫血可导致（）
缺铁性贫血、铅中毒贫血是由于（）

A.红细胞生成过多

B.红细胞生成减少

C.红细胞丢失过多

D.血红蛋白生成减少

E.红细胞生成素产生减少和作用迟钝

答案

参考答案：B,E,D

阅读理解

阅读理解。

Lucy shows the weights of her classmates. She draws a chart to show the different weights in her

class.

1.What is the weight of most of the students?

A.55kg.

B.50kg.

C.10kg.

2. How many students only weigh 30 kg?

A. Three students.

B. Thirty students.

C. We can't get the answer.

3. How many students weigh 80 kg?

A. One.

B. None.

C. We don't know.

4.Which of the following is not true?

A.4 students weigh 40 kg.

B. Only one student weighs 70 kg.

C. Most students weigh 55 kg.

5. How many girl students are there in Lucy's class?

A.38.

B.40.

C.We don't know.

填空题

在问题解决过程中，提出假设常用的方式有算法式和______。