电脑开机显示英文不动怎么回事，计算机辅助设计的英文缩写是什么

• 1、计算机辅助设计的英文缩写是什么
• 2、英语中on,at,in的用法与区别on,at,in在表示时间用法与区别
• 3、wrong是什么意思
• 4、新概念英语第一册145页测试题答案想知道全部答案
• 5、电脑开机,红色指示灯不亮

1、计算机辅助设计的英文缩写是什么

计算机辅助设计英文简称CAD。设计人员通常用草图开始设计，将草图变为工作图的繁重工作可以交给计算机完成；利用计算机可以进行与图形的编辑、放大、缩小、平移和旋转等有关的图形数据加工工作。

2、英语中on,at,in的用法与区别on,at,in在表示时间用法与区别

前置词在表示时间是使用at,in,on.它们所表示的时间有所不同.
AT 表示某一特定的时间.
例：at 3 o’clock (在3点)
at 10:30am (在上午10点30分)
at noon （在中午）
at bedtime (在夜间)
at sunset/at sunrise (在日落/日出时)
at the moment (在那瞬间)
ON 表示日期
例：on Sunday (or any day of the week) (在周六)
on 6 March (在3月六日)
on Christmas Day (在圣诞节)
on my birthday (在我的生日那天)
on New Year’s Eve (在新年前夕)
IN 表示月,年,世纪和更长的时间段
例：in May (or any month of the year) (在五月)
in summer （在夏天）
in 1990 （在1990 年）
in the next century （在下个世纪）
in the Ice Age （在冰川时期）
如何记忆这三个表示时间的前置词的用法呢.我建议你首先记住三个有代表性的短语.以后遇到其他用法是按时间段来推断.
在三个短语是：
at 5:00am (那一时刻),
on 10 October （在10月10日）,
in the Ice Age （在冰川时期）.
注意在at 5:00am 中的am,在 on 10 October 中的October ,在 in the Ice Age 中的Ice,它们都提醒你前置词的第一个字母.你记住了这三个短语,以后遇到其他用法是按时间段来推断.

3、wrong是什么意思

wrong [rɔŋ,rɔ:ŋ]
n.坏事；不公正
adj.错误的；失常的；不适当的
adv.错误地；邪恶的,不正当地
vt.委屈；无理地对待；诽谤

4、新概念英语第一册145页测试题答案想知道全部答案

二、
1、I must call the doctor.He must call the doctor(情态动词后动词为原形）
2、I am going to telephone him.He is going to telephone him.
3、I can go with her.he can go with her(CAN是情态动词,后面同样用原形）
4、I have a new car.He has a new car.
5、I COME from America.He comes from America（第三人称后动词加s）
6、I am American.He is American.
7、I like ice cream.He likes ice cram.
8、I want a newspaper.He wants a newspaper.
9、I was at school yesterday.He was at school yesterday.
10、I don't live here.He doesn't live here.(第三人称用does.)
三、
1、There is a watch on the table.
There are some watches on the table.(watch以CH结尾,复数加es)
2 、There is a knife near that tin.
There are some knives near that tin.(fe结尾,变f为v加s)
3、 There is a policeman in the kitchen.
There are some policemen in the kitchen.(MAN的复数为MEN）
4、 There is a cup on the table.
There are some cups on the table(规则型直接加S)
5、 There is a letter on the shelf.
There are some letters on the shelf.(同上)
6、 There is a peach on the desk.
There are some peaches on the desk.
7、 There is a passport on the shelf.
There are some passports on the shelf.
8、There is a fish in the cupboard.
There are some fishes in the cupboard.
9、 There is a tree in the garden.
There are some trees in the garden.
10、There is a boat on the river.
There are some boats on the river.
四、
1、 a 2、some 3、some 4、any 5、a 6、 a 7、any 8、any 9、some 10、some
五、
1、at 2:on 3:in 4:from 5 :in 6:at 7:in 8:in 9:on 10:at
六、
1：over 2:under 3:across 4:along 5:on 6:in 7:off 8:between 9:into 10:out of
七、
1：making 2:swimming 3：shining 4:shaving 5:running 6:sitting 7:typing 8:putting 9:coming 10:giving.
八、
1、Q：Can he come now
Q:when can he come?
n:He can't come now.
2、Q:Is there a newspaper on the desk.
Q:What is there on the desk?
N:There isn't a newspaper on the desk.
3、Q：Does he want a new car.
Q:what does he want?
N:He doesn't want a new car.
4、Q:Is he going to come now?
Q:When is he going to come?
N:he isn't going to come now.
5、Q：Do they like ice cream?
Q：What do they like?
N:they don't like ice cream.
6、Q：does he come from Germany?
Q:Where does he come from?
N:He doesn't come from Germany.
7、Q：Must they go home now?
Q:When must they go home?
N:They mustn't go home now.
8、Q:Does he feel ill?
Q:How does he?
N:He doesn't feel ill.
9、Q:Does he have a headacha?
Q:What does he have?
N：He doesn't have a headache.
10、Q：Did he clean his shoes?
Q:When did he clean his shoes?
N:He didn't clean his shoes.

5、电脑开机,红色指示灯不亮