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【简答题】
组织依次施工时,其特点包括 A. 没有充分地利用工作面进行施工,工期长; B. 如果按专业成立工作队,则各专业队不能连续作业; C. 施工现场的组织管理工作比较复杂; D. 单位时间内投入的资源量较少,有利于资源供应的组织;
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【单选题】What does the author imply by saying '…is far less abstract in Hawaii than in other places' (Line 2, Para. 4)?
A.
Hawaii is much safer than other places.
B.
Hawaii is not frightened by extinction.
C.
Hawaii has tried its best to reserve the land.
D.
Hawaii has gone through much extinction.
【单选题】Mauna Kea in Hawaii: Astronomy on the World's Highest Island Mountain Four thousand years ago, a volcano exploded in a far away area of the Pacific Ocean. Today, the Mauna Kea volcano is inactive. It ...
A.
Y
B.
N
C.
NG
【简答题】在题图 2.2 所示电路中,已知 U S =6V , I S =2A , R 1 =3 Ω, R 2 =6 Ω, R 3 =5 Ω, R 4 =7 Ω。试用电压源与电流源等效变换法计算电阻 R 4 中的电流 I 4。
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