一个扇形的圆心角为90°.半径为2,则这个扇形的弧长为().(结果保留π)A.2π

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问题:

一个扇形的圆心角为90°.半径为2,则这个扇形的弧长为().(结果保留π)

A.2π 

B.π 

C.1/2π

D.3/2π

考点:教师招聘考试中学教师招聘笔试教师公开招聘考试小学数学
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当企业的资产总额大于负债总额时,如果用银行存款偿还应付账款,将会使企业的资产负债率上升。()

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培训管理者在发展阶段扮演的角色是()。

A.教练

B.仆人

C.设计师

D.组织战略的促进者

E.培训的实施者

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可考虑的检查包括()

A.CTA

B.MRA

C.数字减影血管造影(DSA.

D.MRI

E.SPECT

F.PET-CT

G.条件允许时,立体定向穿刺活检

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