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【单选题】
Match the headings with the four paragraphs of the leaflet. a. Help the environment when you shop c. Help the environment when you travel b. Help the environment when you drive d. Help the environment when you are at home Doing Your Bit for the Environment ____ In most countries, there are too many privately owned vehicles on the roads, so rent a bike and see the country that way. It is good for the country, and it is also good for your health. Catch trains and buses whenever you can. In many countries, public transport is cheap, clean, and pleasant. Save water. Use the towels in your hotel for at least two days. The citizens of many of your favorite vacation places may suffer because they don’t have enough clean water. ____ Buy products from recycled material. Try to find products with very little packaging. Reuse plastic or paper shopping bags. When buying electrical products, choose the most energy-efficient ones to reduce the electricity you use. Buy clothes made with natural fibers such as cotton, silk, and wool. ____ Before you get into your car, ask the question “Is my journey really necessary?” The shortest car trips cause the worst pollution because the engine is cold. Share car trips with your family, neighbors, or friends. Check and maintain your car regularly. A poorly maintained car uses extra gas. Don’t sit in your car with the engine going, as that wastes fuel. Don’t keep unnecessary items in the trunk. If your car is heavy, it uses more fuel. Obey the speed limit. Driving at 80 km/h can use 25 percent less fuel than driving at 110 km/h. ____ Think about how much energy you use in the house. There are many things you can do to help. Can you turn down your heating? Do you leave lights on? Do you leave your computer and your TV on standby? All of these things use up energy and create more warming of the planet. You can also buy energy efficient appliances and light bulbs. Saving energy starts with you.
A.
acdb
B.
cabd
C.
dacb
D.
bcda
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举一反三
【多选题】旧经济与顾客经济的主要差异,下列哪些描述正确?()
A.
旧经济是以企业的产品为中心
B.
旧经济着重顾客终身价值
C.
旧经济重视市场占有率
D.
旧经济着重网羅新顾客
【单选题】国际标准化组织的标准代号是
A.
GB
B.
JB
C.
YB
D.
ISO
【单选题】国际标准化组织的标准代号是()。
A.
GB
B.
ISO
C.
IP
D.
ASTM
【单选题】某乙类双电源互补对称功率放大电路中,电源电压为±24V,负载为8Ω,则选择管子时,要求ICM大于:
A.
1A
B.
2A
C.
3A
D.
4A
【单选题】乙类双电源互补对称功放电路中,± V CC =± 12V ,则功率BJT的集电极和发射极之间的最大压降为( )
A.
6V
B.
12V
C.
24V
D.
48V
【判断题】在所有的行业里,顾客永远是上帝,顾客永远是对的。()
A.
正确
B.
错误
【单选题】某乙类双电源互补对称功率放大电路中,电源电压为±24v,负载为8Ω,则选择管子时,要求 PCM大于:
A.
0.36W
B.
0.72W
C.
0.84W
D.
1.2W
【单选题】有养殖珍珠之父称谓的是
A.
A) 欧本海默
B.
)塔瓦尼埃
C.
C) 御木本幸吉
D.
D) 罗德斯
【单选题】永安拥有全国首家林业上市公司()
A.
智胜化工
B.
永安万年水泥有限公司
C.
永安林业集团
D.
永安绿箭食品有限公司
【单选题】某乙类双电源互补对称功率放大电路中,电源电压为±24v,负载为8Ω,则选择管子时,要求U(BR)CEO大于:
A.
12V
B.
24V
C.
36V
D.
48V
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