短路发生时，( )导体所受电动力最大。A．(A) A相 B．(B) B相 C．(C

某油田2012年12月份生产销售原油5万吨，售价1500万元，销售人造石油1万吨，售价300万元，销售与原油同时开采的天然气2000万立方米，售价500万元。已知资源税税率为5%。该油田2012年12月份应缴纳的资源税税额为()万元。(以上售价均为不含增值税售价)

A、75

B、49

C、115

D、100

About 187 passengers were reported  _____ the shipwreck which happened last month.

A．to have been survived

B．having survived

C．to have survived

D．to survive

已知等差数列{a_n}（n∈N^*）的首项a₁＞0，设S_n为{a_n}的前n项和，且S₆=S₁₁，则当S_n取得最大值时，n=______．

商业计划书的实用技巧有哪些（）

A.照葫芦画瓢

B.以创业成功的三大核心要素为主线

C.写实商业模式的关键环节

D.内容细分，顺序整合

• (A) 条件(1)充分，但条件(2)不充分．
• (B) 条件(2)充分，但条件(1)不充分．
• (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
• (D) 条件(1)充分，条件(2)也充分．
• (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

Over a seven-week period a company monitored the output of two of its branches, C and D. Each week the company calculated how many units were produced in each branch. The branch that produced the greatest number of units for four or more of the seven weeks was considered the more efficient branch. Which office was deemed the more efficient
(1)Over the seven-week period Branch C produced twice as many units as Branch D.
(2)The branch that was more efficient was known by the fifth week.