During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle

A．ensure penetration and distribution of the fuel in the combustion chamber

B．ensure the needle valve is flushed clean during each injection

C．prevent combustion gas blowback into the open needle valve

D．prevent reflected pressure waves when the needle valve close

A.OVE

B.NVGRE

C.STT

D.VXLAN

A. over

B. away

C. through

D. out of

The two products _____ the same category.

A: fall off

B: fall down

C: fall into

D: fall over

Date line passed eastbound, ______.

A.jumping over today

B.backing to yesterday

C.jumping over tomorrow

D.backing to the day before yesterday

IP Over SDH与IP Over ATM比较，以下说法正确的是()

A.IP Over SDH通常应用于点到点链路中

B.IP Over ATM提供丰富的QoS功能

C.IP Over ATM设备成本较高

D.目前IPO ver SDH更适宜普及

Flow control is a function that prevents network congestion by ensuring that(66)do not over-whelm(67)with data. There are three commonly used methods for handling network congestion.(68)is used by network devices to temporarily store bursts of excess data in memory until they can be processed.(69)are used by receiving devices to help prevent their buffers from overflowing.(70)is a flow-control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

Flow control is a function that prevents network congestion by ensuring that(71)do not overwhelm(72)with data.

There are three commonly used methods for handling network congestion.(73)is used by network devices to temporarily store bursts of excess data in memory until they can be processed(74)are used by receiving devices to help prevent their buffers from overflowing.(75)is a flow-control scheme in which the source device requires an acknowledgment from the destination aider a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

A.the intake valve and the inlet valve

B.the intake valve and the inlet valve

C.the output valve and the inlet valve

D.the exhaust valve and the output valve

A.butterfly valve

B.spectacle valve

C.check valve

D.globe valve