若设置字段的输入掩码为“####—######”，该字段正确的输入数据是( )。 A: 0755—123456 B: 0755—abcdef C: abcd—123456 D: ####—######

There’s a feeling of unrest nowadays. A: in the air B: on the air C: by air D: in air

/tmp目录被默认设置的权限为（）。 A: 0777 B: 0755 C: 1777 D: 1755

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.

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

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

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