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【单选题】
一平面与两个投影面倾斜,与第三个投影面垂直,称为A.
一般位置面
B.
投影面平行面
C.
投影面垂直面
D.
任意斜面
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】We have beef steak _______________ great quality from Australia.
A.
in
B.
with
C.
at
D.
on
【简答题】Now Web hosting providers attaches great importance to quality support.
【简答题】Modesty is a kind of great quality, which is ____it takes to be your personal best.
【简答题】We are laying great emphasis on the teaching quality.
【单选题】The sun glasses are ( ) great quality and beautiful design.
A.
with
B.
in
C.
of
D.
to
【简答题】We appreciate the great quality of your products, but unfortunately your prices appear to be too high.
【简答题】Great quality!Great values!
【单选题】对于一个气固相催化反应,减小外扩散和内扩散影响的措施正确的是
A.
提高反应器内气体的流速，减小催化剂颗粒的直径
B.
降低反应器内气体的流速，减小催化剂颗粒的直径
C.
降低反应器内气体的流速，增大催化剂颗粒的直径
D.
提高反应器内气体的流速，增加催化剂颗粒的直径
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