皮皮学，免费搜题
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【多选题】
透视学主要是研究眼睛与物体间的关系( )构成了透视的三要素。A.
眼
B.
物
C.
画面
D.
视平面
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】I don't understand what your plan is exactly. Could you be a little more________? [ ]
A.
special
B.
particular
C.
specific
D.
typical
【简答题】Born in America, I spoke English, not Chinese, the language of my ancestors. When I was three, my parents flashed cards with Chinese 21 at my face, but I pushed them 22 . My mom believed I would l...
【简答题】阅读理解。 Once (从前) there was an old king. He liked to hear lies (说谎) very much. Because he felt very excited for that. 'If anyone could tell me the most wonderful lie in the world, he could marry my only...
【单选题】在光栅位移传感器中，为了得到两个相位相差90°的正弦信号，一般在相距______莫尔条纹间距的位置上设置两个光电元件。( )
A.
1／4个
B.
1／3个
C.
1／2个
D.
1个
【单选题】---Could you tell me ? ---Sorry, I have no idea. I wasn't at the party.
A.
what does she say at the party
B.
what did she say at the party
C.
what she says at the party
D.
what she said at the party
【简答题】光栅传感器中，为了判断光栅移动的方向，应在相距1/4莫尔条纹宽度处安装两个光敏元件，这样，当莫尔条纹移动时，将会得到两路相位相差______的波形。
【单选题】4C组合认为,( )是企业一切经营活动的核心
A.
顾客（customer)
B.
成本（cost)
C.
便利（convenience）
D.
沟通（commnunication）
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