A person with the blood type AB can ______ any type of blood.

A:apply B:recognize C:receive D:absorb

What type of radar can activate a racon?

A:X-band radar B:S-band radar C:C-band radar D:No radar can

The diesel engine is a type of _____.

A:turbine engine B:gas turbine C:steam engine D:internal combustion engine

A vacuum is initially created in a flash type distilling plant by _____.

A:the flashing of the feed water B:the condensation of the saltwater feed C:air ejectors, eductors, or a separate vacuum pump D:condensation of the distillate

The efficiency of a flash type evaporator can be increased by .

A:lowering brine discharge density B:decreasing the absolute pressure of each stage C:increasing the saltwater feed heater temperature D:increasing the pressure at the spray pipe

In a disk-type lubricating oil purifier, _______.

A:the purifier driving gears are lubricated by the reclaimed B:oil as it leaves the bowl all dirt and sludge are automatically discharged with thecooling water C:sealing water must never be supplied until after oil is fed to the unit D:deterioration of the bowl ring gasket will cause the purifier to lose its water seal

______ is not a type of charter-party.

A:A voyage charter-party B:A time charter-party C:A charter-party by demise D:The charter of the United Nations"

GPON的网络保护中，以下对Type A和TypeB描述正确的是

A:TypeA保护分支光纤，TypeB保护光纤 B:Type A保护主干光纤，Type B保护分支光纤 C:type B需要1：N的分光器，type A需要2：N的分光器 D:type A和type B都是保护主干光纤

接入侧GPON支持type A,type B,typeB双归属,typec等保护，其中必须借助 网管进行配置实现保护的是

A:type A B:type C C:type B D:type B双归属