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【单选题】
相关系数与回归系数可以是负值，是由于下列可出现负值( )A.
∑(X-X)2
B.
∑(Y-Y)2
C.
∑XY-(∑X)( ∑Y)/n
D.
∑Y2-(∑Y)2/n
E.
∑(X-X)2/n
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【单选题】A new era is upon us. Call it what you will: the service economy, the information age, the knowledge society. It is all translated to a fundamental change in the way we work. Already we've partly been...
A.
the service industry is relying more and more on the female work force
B.
manufacturing industries are steadily increasing
C.
people find it harder to earn a living by working in factories
D.
most of the job opportunities can now be found in service industry
【单选题】The burden of proving unseaworthiness is upon those who（）it.
A.
approves
B.
alleges
C.
allows
D.
permits
【单选题】This (equipment) is (based upon) advanced (techniques) and it is (highly reliable).
A.
equipment
B.
based upon
C.
techniques
D.
highly reliable
【单选题】根据《2011-2015年全国红色旅游发展规划纲要》，到2015年，我国要再重点建设( )个内涵丰富、品牌突出、特色鲜明、具有一定规模和较高管理服务水准的红色旅游经典景区。
A.
120
B.
130
C.
140
D.
150
【单选题】It is that indestructible matrix upon which the character is built,and whose shape it must take and keep throughout life.
A.
Human character is built on nothing but that indestructible matrix.It takes the shape of that matrix and keeps it for a lifetime.
B.
Character is built on an indestructible matrix,which must take the shape of the character and keep that character during one's life.
C.
The indestructible matrix is built on character,takes the shape of character and keeps the character throughout life.
D.
The indestructible matrix is built on character,which takes the shape of the matrix and keeps it life long.
【多选题】《2011-2015年全国红色旅游发展规划纲要》(简称《二期规划纲要》)由( )联合下发。
A.
中共中央办公厅
B.
中共中央宣传部
C.
中共中央组织部
D.
国务院办公厅
E.
国家旅游局
【单选题】England is rather short of arable land , so it is absolutely dependent upon other countries for her food __________．
A.
offers
B.
stores
C.
supplies
D.
sales
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