四. 段落翻译All around the world， large cities have the same problem：air pollution．Mexico City has very bad air．The air there is dirty and very unhealthy．Cars are one reason for the dirty air．Many Mexicans own their own cars and drive in the city．The factories in the area also cause air pollution．It is not easy to clean up the air in large cities．The government has to make new laws．
四. 段落翻译All around the world， large cities have the same problem：air pollution．Mexico City has very bad air．The air there is dirty and very unhealthy．Cars are one reason for the dirty air．Many Mexicans own their own cars and drive in the city．The factories in the area also cause air pollution．It is not easy to clean up the air in large cities．The government has to make new laws．
There’s a feeling of unrest nowadays. A: in the air B: on the air C: by air D: in air
There’s a feeling of unrest nowadays. A: in the air B: on the air C: by air D: in air
4. From the control tower, air traffic controllers coordinate aircraft movement both ________ and on the ground. A: on the air B: in the air C: at the air D: of the air
4. From the control tower, air traffic controllers coordinate aircraft movement both ________ and on the ground. A: on the air B: in the air C: at the air D: of the air
智慧职教: Compressed air is supplied by air compressors to air receivers.
智慧职教: Compressed air is supplied by air compressors to air receivers.
An air waybill is used for air transport. It is an evidence of a ( ).
An air waybill is used for air transport. It is an evidence of a ( ).
The air leakage of tubular air preheater is larger than that of rotary air preheater (). A: Right B: Wrong
The air leakage of tubular air preheater is larger than that of rotary air preheater (). A: Right B: Wrong
What is the talk mainly about A: The definition of air pollutant. B: The causes of air pollution. C: The dangers of air pollutants. D: Ways to fight air pollution.
What is the talk mainly about A: The definition of air pollutant. B: The causes of air pollution. C: The dangers of air pollutants. D: Ways to fight air pollution.
In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve? A.Noise coming from that air starting valve B.Continuous operation of the starting air compressor C.Zero air pressure in the air starting system D.Overheated starting air pipe to the cylinder head
In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve? A.Noise coming from that air starting valve B.Continuous operation of the starting air compressor C.Zero air pressure in the air starting system D.Overheated starting air pipe to the cylinder head
Whether we go to Paris is ______. A: [A] on the air B: [B] in the airs C: [C] in the air D: [D] with the air
Whether we go to Paris is ______. A: [A] on the air B: [B] in the airs C: [C] in the air D: [D] with the air
智慧职教: 3.S1:Isn't the emergency air compressor started? S2:Yes. But the emergency air compressor can't supply enough starting air to the air receiver for the auxiliary engine. Q:How is the emergency air compressor?
智慧职教: 3.S1:Isn't the emergency air compressor started? S2:Yes. But the emergency air compressor can't supply enough starting air to the air receiver for the auxiliary engine. Q:How is the emergency air compressor?