fuel-air ratio
compression ratio
fuel rack
viscosity index
第1题：
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
第2题：
Maintaining the lowest possible scavenging air temperature at all times is not recommended due to the possibility of the ______.
A.air charge density becoming too high
B.piston crown surfaces becoming too cold
C.formation of excessive quantities of condensate
D.compression pressure being greatly reduced
第3题：
此题为判断题(对，错)。
第4题：
若DF=1，执行串操作指令MOVSW时，地址指针自动变化是（）.
第5题：
nternational Transport Transport plays an important part in international business because goods produced have to be delivered to the buyers abroad, and the delivery of goods is to be made possible by transport services. Goods are carried by several means of transport on road or rail, by sea or air. And in recent years, combined transport which is a road-sea-rail carriage appeared. With the expansion of international trade, the container service has become popular. The use of containers provides a , highly effective form of transport . by road, rail and sea, Basically , orabout 98% of world trade is carried out by sea transport.Besides transport by sea, road, or rail, nowadays in order to speed up delivery, carriage by air international has also become popular. Today carriage by air has become popular because it can speed up delivery.
第6题：
Software Engineering is best described as （ ）.
A.the practice of designing, building, and maintaining off-the-shelf software from prefabricated parts
B.the practice of designing, building, and maintaining ad-hoc software without the use of formal methods
C.the practice of designing, building, and maintaining reliable and cost-effective software using standard techniques
D.the practice of designing, building, and maintaining fast and flexible software specifically for engineering applications
第7题：
第8题：
交换寄存器SI、DI的内容，正确的程序段是( )。
A．PUSH SI
B．PUSH SI PUSH DI PUSH DI POP SI POP DI POP DI POP SI
C．MOV AX，SI
D．MOV AX，SI MOV SI，AX MOV BX，DI MOV DI，BX XCHG BX，AX
第9题：
首次应用类毒素进行预防接种的科学家是（）。
第10题：
Air cargo is （）