A-frames and cylinder block is held together by （） to form a rigid structure.

[单选题]At the top of the A-frames there is a strong cast iron frame called （）.A . cylinder linerB . cylinder coverC . the gear boxD . the scavenging box

[单选题]（） of the A-frames there is a strong cast iron frame called the scavenging air box.A . At the topB . At the bottomC . In the topD . In the bottom

[单选题]A-frames are mounted on the bed plate and support （） and cylinder block.A . the main bearingB . the cylinder coverC . the entablatureD . the sum

cylinder block的意思是？A. 汽缸盖B. 气缸体C. 气缸壁

[单选题]The cylinder head, cylinder liner and （） form the combustion chamber.A . frameB . pistonC . crankcaseD . explosion plate

[单选题]（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A . The fuel oilB . The lube oilC . The sea waterD . The fresh water

[单选题]Cracks in cylinder and cylinder covers may （） from unequal heating.A . makeB . causeC . resultD . produce

The spaces in the cylinder head and the space between the cylinder jacket 1 and

[单选题]Frames to which the tank top and bottom shell are fastened are called（）.A . floorsB . intercostalsC . stringersD . tank top support

[单选题]移动台在对接收到的总帧数（TOT_FRAMES）以及坏帧数（BAD_FRAMES）两个计数器清零之后，重新启动计数器之前最大等待的时间为（）帧。A . 63B . 124C . 248D . 512