口腔科器械如果使用化学消毒灭菌剂灭菌，必须多长时间进行有效浓

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问题单项选择题

口腔科器械如果使用化学消毒灭菌剂灭菌，必须多长时间进行有效浓度的测定

A．1日
B．2日
C．3日
D．5日
E．7日

答案

参考答案：A

解析：使用化学消毒剂灭菌必须在每日开诊前进行有效浓度监测。

阅读理解

阅读短文，选择正确的答案，把序号写在前面的括号里。

Look at these two pictures. This is a picture of my faniily. You can see my father, my mother, my sister

and me. My father is a policeman. My mother is a teacher. My name is Lingling, my sister's name is Fangfang.

We are twins. We are students. That is a picture of our bedroom. You can see two beds, two desks and two

chairs in it. The red blouse on the bed is mine. The blue one on the desk is hers. You can see shoes under the

beds. My shoes are white. And hers are black. It's a nice room.

（）1、You can see gifts in the picture.

A. one B. two

C. three D. four

（）2、Lingling and Fangfang are .

A. brothers B. sons

C. friends D. twins

（）3、 is a teacher.

A. Fangfang's mother B. Lingling's father

C. Fangfang D. Lingling

（）4、Where's the blue blouse? It's .

A. on the desk B. on the bed

C. on the chair D. under the bed

（）5、 shoes are white.

A. The twins' B. The twins' father's

C. Fangfang's D. Lingling's

（）6、Where are the black shoes? They're .

A. on the bed B. under the beds

C. on the chair D. under the desk

材料分析题

水循环是联系地球各圈层的纽带。读下列材料，回答问题。

材料一：水循环示意图

（1）材料一中丁→甲→丙→丁循环过程是_________循环。水循环对乙图所示山区直接提供的资源主要

有_________资源和_________资源。

（2）水循环中①环节的能量来源于_______。目前，人类直接利用的淡水资源主要来源于水循环的_____

环节（填数字）。人类可以通过_________和__________等措施来改善水资源的时空分布，以更好地满

足人们对水资源的需求。

（3）材料二是丙图中河流的径流量年变化图，据图判断，该河最主要的补给水源来自________，该河位

于我国的________地区。该河流水量在6月份比较低，原因是__________________________________。