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【简答题】
如果两个不等于零的矢量的叉积等于零,则此两个矢量必然相互 。
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【简答题】Have you ever suddenly felt that someone you know was in trouble—and he was? Have you ever dreamed something that came true later? Maybe you have ESP. ESP stands for（代表） Extra Sensory Perception. It m...
【简答题】Have you ever suddenly felt that someone you knew was in trouble—and was he? Have you ever dreamed something that came true later? Maybe you have ESP (超感觉知觉). ESP stands for Extrasensory Perception. I...
【单选题】按照问卷的设计是否固定了结构，问卷可分为（ ）。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
固定结构式
B.
半封闭式
C.
封闭式
D.
无固定结构式
E.
量表式
F.
开放式
【单选题】________ you ________ the Space Museum?
A.
Have; been
B.
Have; ever been to
C.
Have; ever gone to
【简答题】Hi！Have you ever suddenly felt that someone you knew was in trouble—and was he? Have you ever dreamed something that came true later? Maybe you have ESP (超感觉知觉). ESP stands for Extrasensory Perception...
【简答题】Hi! Have you ever suddenly felt that someone you knew was in trouble — and was he? Have you ever dreamed something that came true later? Maybe you have ESP (超感觉知觉). ESP stands for Extrasensory Percept...
【简答题】Have you ever suddenly felt that someone you knew was in trouble—and was he? Have you ever dreamed something that came true later? Maybe you have ESP (超感觉知觉). ESP stands for Extra Sensory Perception. ...
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