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【单选题】
评定内燃机对环境的污染程度或排放特性,常用下列指标()A.
排放分担率
B.
浓度分担率
C.
比排放量
D.
烟度值
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举一反三
【单选题】听力原文： The World Health Organization warns between 25 and 35 percent of the world population could be affected by a human influenza pandemic, but the WHO says most people would survive. Health experts ...
A.
draw a map of affected area.
B.
make a plan for fighting against bird flu.
C.
make a combat.
D.
find ways to prevent human flu.
【简答题】在数字系统中,根据电路逻辑功能的不同,数字电路可分为 逻辑电路 和 逻辑电路 两大类。
【单选题】A third likely explanation for infantile amnesia involves incompatibilities between the ways in which infants encode information and the ways in which older children and adults retrieve it. Whether pe...
A.
What do you remember about your life before you were three? Other important occasions are school graduations and weddings. Few people can remember anything that happened to them in their early years. Adults' memories of the next few years also tend to be scanty. Most people remember only a few events—usually ones that were meaningful and distinctive, such as being hospitalized or a sibling's birth.
B.
What do you remember about your life before you were three? Few people can remember anything that happened to them in their early years. Other important occasions are school graduations and weddings. Adults' memories of the next few years also tend to be scanty. Most people remember only a few events—usually ones that were meaningful and distinctive, such as being hospitalized or a sibling's birth.
C.
What do you remember about your life before you were three? Few people can remember anything that happened to them in their early years. Adults' memories of the next few years also tend to be scanty. Other important occasions are school graduations and weddings. Most people remember only a few events—usually ones that were meaningful and distinctive, such as being hospitalized or a sibling's birth.
D.
What do you remember about your life before you were three? Few people can remember anything that happened to them in their early years. Adults' memories of the next few years also tend to be scanty. Most people remember only a few events—usually ones that were meaningful and distinctive, such as being hospitalized or a sibling's birth. Other important occasions are school graduations and weddings.
【单选题】For an upright vessel, draft is the vertical distance between the keel and the ______.
A.
waterline
B.
freeboard deck
C.
plimsoll mark
D.
amidships section
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