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【判断题】
( )数控加工工艺特别强调定位加工，所以，在加工采用自为基准的原则。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】When he came back, he found the bag he had ________ over the seat was gone. [ ]
A.
left hanging
B.
left to hang
C.
left hung
D.
to leave hanging
【单选题】As a college freshman, he wanted to be an interpreter, ________ he joined a translation club.
A.
for
B.
but
C.
so
D.
as
【单选题】患者女，25岁，头晕、乏力、苍白。查体：血红蛋白80g／L，诊断缺铁性贫血。 遵医嘱给予右旋糖酐铁肌内注射，注射时应该
A.
抽有回血，方可推注药液
B.
与皮肤呈5°角刺人
C.
进针慢、推药快、拔针慢
D.
长针头深部肌肉注射
E.
肌肉注射无需排空气，防止浪费药液
【单选题】--- Where is your brother, Leo? --- He is in Hainan on vacation. He for two weeks.
A.
has gone
B.
has left
C.
has been away
D.
left
【单选题】The percent frequency of a class is computed by
A.
multiplying the relative frequency by 10.
B.
dividing the relative frequency by 100.
C.
multiplying the relative frequency by 100.
D.
adding 100 to the relative frequency.
【简答题】科技类实物众筹的回报方式有哪些?
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