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【判断题】
铁、锌主要来源于瘦肉和动物的肝脏，缺导致儿童患缺铁性贫血。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Is sitting in traffic as inevitable as death and taxes? Perhaps not. Many countries now have dedicated traffic-monitoring centres linked to networks of cameras and sensors. Throw in traffic-spotting a...
A.
dispatch aircraft to spot the traffic.
B.
guarantee drivers have access to the information system.
C.
obtain related reports of accident.
D.
collect data of the positions of buses.
【单选题】Europe and Japan need more labor force because the population growth in these countries has been very low.
A.
Y
B.
N
C.
NG
【单选题】人的心理与生理、精神和身体、机体内外环境是一个完整统一的整体，这一观点被称为（）。
A.
生物、心理、社会医学模式;
B.
生物医学模式;
C.
心理、社会模式;
D.
心理医学模式。
【简答题】翻译 in the early industrialized countries of Europe the process of industrialization—with all the far reaching changes in social patterns that followed—was spread over nearly a century, whereas nowaday...
【单选题】The number of air crashes that ____ in developing countries ____ increasing. [ ]
A.
happens; is
B.
happen; is
C.
happens; are
D.
happen; are
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