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【单选题】
三视图中，H面与V面交于投影轴OX，H面与W面交于投影轴OY，V面与W面交于投影轴OZ。如果某直线的两个投影均平行于OZ轴，则该直线为（）。A.
正垂线
B.
侧垂线
C.
铅垂线
D.
左垂线
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【简答题】动机的主要要素包括（ ）。
【简答题】Make a micro courseware on transcultural communication model and share with the class.
【简答题】超高速主轴单元包括主要包括哪些部分? A主轴动力源 B主轴 C轴承 D机架
【简答题】计算机硬件主要包括主机和输入/输出设备。（ ）
【简答题】What a lovely hair you have.
【单选题】Watch a comedy before going to bed, and you may just ________ sweet dreams. [ ]
A.
end up with
B.
put up with
C.
keep up with
D.
catch up with
【单选题】If you just spend time ________ advantages and disadvantages, you may get nothing in the end. [ ]
A.
matching
B.
balancing
C.
observing
D.
examining
【简答题】医疗机构评审主要包括?
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