has the best engine design in terms of saying money？_________

A . available minimum requirements B . available maximum requirements C . mandatory minimum requirements D . mandatory maximum requirement

A . stop B . start C . speed up D . slow dow

A . O-ring B . gasket C . washer D . packing

A . An alarm device with audible and visible signals is required for all cooling water systems B . Propulsion engines with bores over 200 mm are to be fitted with cooling water jackets C . Each totally enclosed cooling system shall be provided with a suitable head tank D . Drain cocks are to be provided at the lowest points of all cylinder water jacket

A . Routing should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer. B . Routing should always be performed at the distribution layer. C . VLANs should be localized to a switch. D . VLANs should be localized to a single switch unlessvoice VLANs are being utilized. E . Routing should not be performed between VLANs located on separate switches.

A . compression must be low for effective spark ignition B . compression must be low for required horsepower and torque generation C . compression must be low to prevent pre-ignition D . compression must be low to have effective pre-ignitio

A . open the bypass line B . cut in the lube oil cooler C . pressurize the lube oil system D . top off the expansion tank

A . alkale scence B . acidity C . salinity D . impurity

A . 正确 B . 错误

A . camshaft beatings B . main bearings C . piston crowns D . cylinder wall

A . Oil temperature B . Manifold pressure C . Exhaust gas temperature D . Fuel consumptio

A . reciprocating at the piston pin, rotary at the crank pin B . reciprocating at the crank pin, rotary at the piston pin C . straight reciprocation D . straight rotatio

A . Reduce unnecessary disruption， delay，rework， and other problems by establishing test cases for use in verifying that the systems meets operational， functional， and interface requirements B . Improve its ability to make sound financial decisions by developing a business case based on its business requirements and establishing a basis for developing a technology strategy C . Reduce operating costs and limit charge-related incidents by providing a consistent and efficient set of processes D . Improve the return on investment and hasten migration by identifying and planning for necessary infrastructure changes and resource additions， as well as reduce deployment costs by analyzing gaps in early in the planning process to determine whet is needed to support the system

A . to a great extent B . on a great extent C . on mainly D . on only

A . the prevention of collision B . the promotion of the traffic flow C . the complying of port regulation D . the development of navigational technique

A . increased horsepower B . reduced efficiency C . increased heat loss D . lower cylinder pressure

A . providing a step-by-step plan that details the installation and service-commission tasks required in order to create a controlled-implementation environment that emulates a customer network B . assessing the ability of site facilities to accommodate proposed infrastructure changes C . developing and executing proof-of-concept tests， validating high-level infrastructure design， and identifying any design enhancements D . improving the network management system and the performance and functionality of infrastructure operatio

A . Lube oil pressure gauge B . Jacket water temperature gauge C . Tachometer D . Exhaust pyrometer

A . cross-head B . cylinder C . connecting rod D . spark plug

A．Right B．Wrong C．Not mentioned

A．Right B．Wrong C．Not mentioned

A．A.simple sentence B．B.compound sentence C．C.complex sentence D．D.compound-complex sentence