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【单选题】
以下( )特征可以生成椭圆圆锥实体。A.
拉伸特征
B.
旋转特征
C.
扫描特征
D.
混合特征
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举一反三
【单选题】But for the rain, we ______ a nice holiday.
A.
should have
B.
would have had
C.
would have
D.
will have had
【单选题】物候观测时间应以不失时机为原则,在物候变化大的时候如生长旺期等,观测时间间隔宜短,可每天或2〜3d观测一次,若遇特殊天气,如高温、低温、干旱、大雨、大风等,应随时观测,反之,间隔期可长。一天中最佳观测时间
A.
9：00
B.
12：00
C.
14:00
D.
18：00
【单选题】But for the rain, we ______ a pleased journey.
A.
will have
B.
should have had
C.
would have
D.
must have had
【单选题】But for the rain, we ______ a nice time yesterday.
A.
would have
B.
will have
C.
would have had
D.
should have
【单选题】But for the rain, we ________ on time
A.
will arrive
B.
would arrive
C.
would have arrived
D.
shall arrive
【单选题】But for the rain, we _____ a nice holiday.
A.
should have
B.
would have had
C.
would have
D.
had had
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