为了防止色度信号对亮度信号产生干扰,往往在亮度通道输入端接入()。 A.亮度延迟线

题型:单项选择题

问题:

为了防止色度信号对亮度信号产生干扰,往往在亮度通道输入端接入()。

A.亮度延迟线

B.色度延迟线

C.色副载波滤波器

D.色副载波陷波器

考点:家电维修工试题家电维修工试题题库
题型:单项选择题

阅读理解。

                                                    VISIT THE EAST GARDEN ZOO

     Come and see the new polar bears from Canada. The pandas are waiting to meet you, and the dolphins

are waiting to swim for you. The cranes are waiting to sing for you and the mynahs are waiting to say

hello to you. The snakes are waiting to dance for you. 

     Tickets: Adults(成人): $4                Children: Over 12 $2; Under 12 $1

     Opening Time: 9:00-16:00 on weekdays 9:30-17:00 at weekends

      KEEP THE ZOO CLEAN!                DO NOT FEED THE ANIMALS

1. What can the animals do there? [ ]

A. Swim.

B. Sing.

C. Dance.

D. All the above.

2. Where do the polar bears come from? [     ]

A. They come from China.

B. They come from England.

C. They come from the USA.

D. They come from Canada.

3. When can you visit the zoo? [ ]

A. At 4:30 in the afternoon on Saturdays.

B. At 8:30 in the morning on Wednesday.

C. At 9:00 in the evening on Mondays.

D. At 9:00 in the morning on Sundays.

4. What should a visitor do in the East Garden Zoo?[ ]

A. Play with the animals.

B. Leave no litter.

C. Feed the animals.

D. Go near the animals.

5. Mrs. Smith wants to take her 4-year-old son and 13-year-old daughter to the zoo.

    How much should she pay? [ ]

A. $4

B. $6

C. $7

D. $8

题型:单项选择题

下列路面面层类型中,()是简易铺装路面。

A.沥青混凝土路面

B.沥青贯入式路面

C.水泥混凝土路面

D.沥青表面处治路面

题型:单项选择题

()是消费者在购买过程中对商品或劳务等表现出的心理反应倾向。

题型:单项选择题

业余时间,你喜欢( )。

A.逛大街
B.看小说
C.看电视
D.逛书店

题型:单项选择题

根据噪声的来源可以将其分为四大类,这四类噪声不包括()。

A.交通运输噪声

B.机械噪声

C.建筑施工噪声

D.社会生活噪声

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