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【单选题】
以下属于负反馈调节的是A.
排便反射
B.
泌乳反射
C.
分娩
D.
动脉血压
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【简答题】A．Because he wants to travel to Phoenix. B．Because he works in the travel agency. C．Because he goes to see his girlfriend. D．Because he will go to Florida next week.
【简答题】They ___________ (can，go) out because the light’s on.
【单选题】Later, they found it easier to travel because ______.
A.
they could travel by wagons
B.
they could ride on their tame animals and go across water in hollowed tree trunks
C.
the roads were splendid
D.
the climates were favorable
【单选题】价值工程的核心是对产品进行( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
成本分析 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
B.
功能分析 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
价值分析 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
D.
功能改进 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】Our teacher told us that light ______ faster than sound.
A.
travels
B.
travelled
C.
travel
D.
will travel
【单选题】By making us imagine that we travel at the speed of light, the author tries to ________ .
A.
show us how fast we can travel in the universe
B.
give us an idea of how fast light travels
C.
tell us how close the moon and the sun are to us
D.
give us an idea of how big the universe is
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