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人流活产比(ratio of induced abortion and live birth)
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孕产妇死亡率指的是A、某年孕产妇死亡数占同年内活产数的万分比B、某月孕产妇死亡数占同月内活产数的万分比C、某年孕产妇死亡数占同年内活产数的百分比D、某月孕产妇死亡数占同月内活产数的百分比E、某年孕产妇死亡数占同年内总产数的万分比
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孕产妇死亡率指的是A、某年孕产妇死亡数占同年活产数的千分比B、某月孕产妇死亡数占同月活产数的千分比C、某年孕产妇死亡数占同年活产数的百分比D、某月孕产妇死亡数占同月活产数的百分比E、某年孕产妇死亡数占同年总产数的千分比
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In the 1920’s,but（ ）in the Depression conditions of the 1930’s,the United States experienced a declining birth rate—every thousand women aged fifteen to forty‐four gave birth to about 118 live children in1920，89.2 in 1930，75.8 in 1936,and 80 in 1940.A.extraordinary
B.specially
C.especially
D.specifically
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孕产妇死亡率指的是A.某年孕产妇死亡数占同年内活产数的万分比B.某月孕产妇死亡数占同月内活产数的万分比C.某年孕产妇死亡数占同年内活产数的百分比D.某月孕产妇死亡数占同月内活产数的百分比E.某年孕产妇死亡数占同年内总产数的万分比
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Which of the following statements about California is NOT TRUE？( ) A.California is a sexually liberated state
B.California has a high abortion rate
C.About 40% of the pregnant teenagers chose to have an abortion
D.A recent poll showed that less than half of the respondents supported the amendment
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Which of the following statements about California is NOT TRUE？( ) A.California is a sexually liberated state.
B.California has a high abortion rate.
C.About 40% of the pregnant teenagers chose to have an abortion.
D.A recent poll showed that less than half of the respondents supported the amendment.
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下面出生人口性别比的说法正确的是：（）A、出生人口性别比是活产男婴与活产女婴的比值B、人口性别比=（女性人口/男性人口）×100C、出生人口性别比正常范围在105-108之间D、出生人口性别比正常范围在103-107之间
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单选题For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?（）A
An increase in compression ratio will increase the ignition lagB
An increase in compression ratio will decrease the ignition lagC
A decrease in compression ratio will decrease the ignition lagD
A decrease in ignition lag will increase the compression ratio
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名词解释题矢跨比（shi kua bi）rise-span ratio
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