主/子窗口平常用来显示查询和多个表中的数据,而这些数据之间的关系是( )。A.

题型:单项选择题

问题:

主/子窗口平常用来显示查询和多个表中的数据,而这些数据之间的关系是( )。

A. 年、星期、月、日、小时、分、秒

B. 秒、分、小时、日、月、星期、年

C. 小时、分、秒、星期、月、日、年

D. 星期、月、日、小时、分、秒、年

考点:计算机等级考试ACCESS计算机二级(Access)20
题型:单项选择题

如图所示装置,试管中盛有水,气球a盛有干燥的固体过氧化钠颗粒,U形管中注有浅红色的水已知,过氧化钠与水反应是放热的.将气球用橡皮筋紧缚在试管口,实验时将气球中的固体颗粒抖落到试管b的水中,将发生的现象是

[ ]

A.U形管内红色褪去  

B.试管内溶液变红

C.气球a被吹大  

D.U形管水位d低于c

题型:单项选择题

任务型阅读,根据短文内容完成下列各题。

  I hear the word "time" every morning.  "It's time to get up, Tom!" my wife said to my little son.  

Someone says, "Time is money." But I think time is even more important than money.  Why? Because

when we have no money, we can get it back. However, when time is lost, it'll never return. That's why

we mustn't waste(浪费)time.

  The saying goes, "How time flies!"We always don't have enough time.  Even a second is very

important.  We should make good use of our time to do something useful. But a lot of people do not know

that.  They spent their time smoking, drinking and playing.

In a word, we should save time. We shouldn't leave today's work for tomorrow. Remember we have no

time to waste. Do you think so? My friends, how are you going to spend your time?

1. The writer thinks that time is _____ than money.

2. We mustn't _____time because it'll never _____.

3. We should make good use of our time to do _____.

4. Wasting time means wasting part of their own _____.

5. We should _____ time and we shouldn't _____ today's work for tomorrow.

题型:单项选择题

写出下列物质的化学式:

                氧化镁             氯化钙           

四氧化三铁              高锰酸钾             碳酸钙               硫酸钠              

题型:单项选择题

关于疑似预防接种反应的发生原因,以下正确的是()。

A.不良反应

B.疫苗质量事故

C.接种事故

D.心因性反应

E.以上都是

题型:单项选择题

下列各项中,属“相侮”传变的是()

A.肺病及心

B.肺病及肝

C.肺病及脾

D.肺病及肾

E.肾病及心

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