Access的表中,下列不可以定义为主键的是( )。A.自动编号 B.单字段 C.多

题型:单项选择题

问题:

Access的表中,下列不可以定义为主键的是( )。

A.自动编号

B.单字段

C.多字段

D.OLE对象

考点:计算机等级考试ACCESS二级ACCESS笔试
题型:单项选择题

阅读下面材料,按要求作文。(60分)

冯骥才说“运动中的赛跑,是在有限的路程内看你使用了多少时间;人生中的赛跑,是在有限的时间内看你跑了多少路程。” 根据以上材料写一篇800字的作文。

【注意】①角度自选,立意自定,题目自拟。②除诗歌外,文体不限。

③不少于800字。④不得抄袭。

题型:单项选择题

对干啰音的描述,不正确的是()。

A.音调较高

B.持续时间较长

C.吸气时也可听到

D.呼气时更为明显

E.部位较固定

题型:单项选择题

I am Steve. I was born and grew up in South Wales. My favorite place to play was out on the hills where my imagination had plenty of space to expand.
My family moved out of Wales when I was thirteen. I went to a new school. One of my subjects was French. Because I had never learned any French, my teacher told me to sit in the corner and write anything I was interested in. That’s the time I started writing, just for myself, and I’ve been writing ever since.
I have always loved BIG IDEAS, and so I enjoy writing fantastic stories. And I also write horror stories. I think they are like the old fairy tales, and can teach you important things.
I am in my forties on the outside, twelve on the inside. I like rock music, Indian and Chinese food, and I enjoy drinking. I live in a small village with my wife Mary, ducks, cats, oats, hens and lots of rabbits. If you’d like to find out more about me and hope to buy my books, go to www.sbowkett.freeserve.co.uk.

From the passage, we can learn that the writer ______.

A.lives in a big city with his son
B.likes eating Japanese and Chinese food
C.lives in the countryside with his wife
D.introduces a nice book to us

题型:单项选择题

一贯煎的君药是()。

A.生地黄

B.香附

C.川楝子

D.熟地黄

E.柴胡

题型:单项选择题

下列球形肺炎影像,哪项不对()

A.动态观察,病灶形态变化快

B.边缘模糊不清的球形病灶

C.多数密度均匀

D.空泡征

E.边缘波浪状,可有粗长毛刺

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