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【单选题】
某大型集团公司在其各子公司的高层设有参谋，在高层的一次关于参谋问题的会议上，收集到了如下建议，你认为哪种更科学?()。A.
设参谋之职违反了命令统一的原则，应取消此职
B.
为了不使参谋成为有职无权的摆设，应授予参谋决策和行动的权力
C.
参谋应当只起服务和协调的作用，不应越权或篡权
D.
参谋应当只起服务和协调的作用，没有权力提出决策建议
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【单选题】It was a long time ______ the neighbors found that the old lady had been dead of cold.
A.
when
B.
until
C.
since
D.
before
【简答题】While she was going downstairs, the old lady had her leg (break)______.
【单选题】The old lady had expected to see all her relatives when she was ill in hospital, but none came to see her ______ many of her neighbors offered their help．
A.
when
B.
as
C.
because
D.
while
【简答题】Seeing that the old lady had no chair ___, the boy offered her his own. A, to sit B to be seated C. to seat herself D. to sit on
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