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【简答题】
从侧面观察,脊柱有四个生理性弯曲,其中_______曲和_______曲凸向前,而______曲和_______曲凸向后。
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反馈参考答案：
举一反三
【单选题】Notices to Mariners are published .
A.
every day
B.
every week
C.
every month
D.
every year
【简答题】Is this syllogism valid or invalid?
All published authors are writers.
Some writers are professors.
Therefore, some professors are published authors.A. Valid B. Invalid
【单选题】Navigational Warnings are published according to
A.
the designed area
B.
the designated area
C.
the indicated area
D.
all area over the world
【单选题】Is this syllogism valid or invalid? All published authors are writers. Some writers are professors. Therefore, some professors are published authors.
A.
Valid
B.
Invalid
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