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【单选题】
二十五岁已婚妇女，以往月经不规则，3～4日1～3月。现停经6月，于停经3月时感恶心，食欲减退。最近几日感觉胎动，检查乳头、乳晕着色加深，达脐耻之间。借助多普勒探测仪可听到胎心。 假设该妇女已妊娠，确诊宫内妊娠应选择（）A.
最早在停经4时行阴道B型超声查看宫内妊娠囊
B.
最早在停经5时行阴道B型超声检查看是否妊娠囊内有胚芽和原始心管搏动
C.
最早在停经6时行阴道B型超声检查看是否妊娠囊内有胚芽和原始心管搏动
D.
行妇科检查看子宫是否增大变软
E.
行子宫颈黏液检查
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【单选题】—I wonder why Mr. Brown hasn't showed up at the meeting yet. —I' m not sure, but he ________ in a traffic jam driving here.
A.
might have been stuck
B.
could be stuck
C.
must have stuck
D.
might stuck
【单选题】Isobel consumes positive quantities of both jam and and juice. The price of jam is 5 cents per unit and the price of juice is 10 cents per unit. Her marginal utility of jam is 10 and her marginal util...
A.
Without changing her total expenditures, she could increase her utility by consuming more jam and less juice.
B.
Without changing her total expenditures, she could increase her utility by consuming more juice and less jam.
C.
Without changing her total expenditures on jam and juice, she could not increase her utility.
D.
We can't tell whether any of the other statements are true or false without knowing the quantities she consumes.
【简答题】A．impel B．spur C．force D．urge
【简答题】[A] accident [B] gathering [C] jam [D] crowd
【单选题】The president _____ all people _____ our environment. [ ]
A.
urge, to protect
B.
urged, to protect
C.
urges, protect
D.
urged, protect
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