A: decreased
B: increased
C: fixed
D: closed
举一反三
- The humidifier's valve of air-conditioner should be____, when the temperature is 5-8℃ in the winter. A: decreased B: increased C: fixed D: closed
- A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four stroke A.① B.② C.① and ② D.Neither ① nor ② is correct
- The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
- ______can cause oil flow from water outlet of the oil purifier. A: Oil inlet valve opening too quickly B: Oil temperature little higher than normal C: Diameter of gravity disc too small D: Viscosity of oil little lower than normal
- The air-conditioner is running in the winter and to be stopped, we should（） A: close Fan and Humidifier at the same time B: firstly close Fan and then close humidifier immediately C: firstly close humidifier and then close Fan immediately D: firstly close humidifier and then close Fan after 30 second
内容
- 0
The assembly line significantly _________the assembly time per vehicle and _______the profit margin. A: decreased; increased B: increased; decreased C: increased；increased D: decreased；decreased
- 1
Do you mind ________? A: to turn up the air conditioner B: turn up the air conditioner C: turning up the air conditioner D: to turning up the air conditioner
- 2
In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）， there being an adequate overlap between the inlet opening and the exhaust closing.
- 3
Each cylinder has one starting valve which is usually opened by air pressure and closed by （）
- 4
When temperature is higher than melting point, ( ) affect(s) water activity. A: sample composition B: sample weight C: sample color D: temperature