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【简答题】
一辆卡车和一辆客车分别从甲、乙两城同时出发，而行，卡车到达后立即返回，客车到达甲城后也立即返回。已知卡车和客车的速度比为4：3，两车第一次相遇地点距第二次相遇地点24千米，、乙两城相距多少千米？
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反馈参考答案：
举一反三
【单选题】将形体连同确定其空间位置的直角坐标系，用平行投影法沿不平行于任意坐标平面的方向投射到选定的一个投影P上，所得到的投影称为（）
A.
、标高投影图
B.
、正投影图
C.
C、轴测投影图
D.
、透视图
【简答题】The school promised r______( 迅速 ) results in the learning of languages.
【单选题】Whether or not the next plan will yield any positive results ______ to be Seen.
A.
remain
B.
remains
C.
is remained
D.
have remained
【单选题】Which of the following statement is correct?( )
A.
The definition phases results in the Software Requirements Specification
B.
Testing is optional in software life cycle
C.
CASE tools can only aid in the design phase of a software lifecycle
D.
A change during a later phase does not require the documentation of all Earlier phases to be updated
【单选题】According to the passage, studies on the results of copyright protection
A.
lag behind the research in other fields.
B.
need to be done in a practical way.
C.
should be carried out immediately.
D.
will promote cultural innovation.
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