题目内容
（请给出正确答案）
The backbone of Canadas economy is______.
A．forestry
B．agriculture
C．service industry
D．manufacturing
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A、CANA、CANB
B、CANC
C、CAND、CANE
D、CANC、CAND
According to the new Frontline Health Workers Coalition, training health care workers can
A．improve the image of non-governmental organizations.
B．promote the progress of health treats all over the world.
C．help U.S. medical manufacturers earn much profit.
D．satisfy the donors" need to offer their help to others.
A.System monitoring and optimization
B.Routing
C.User management
D.File backup
______is sometimes called the "backbone of England".
A．The Sperrin Mountains
B．The Cambrian Mountains
C．The Pennine Chain
D．The Cheviot Hills
______is(are)considered as "the backbone of the continent" in America, and is(are) also known as the Continental Divide.
A．The Appalachian Mountains
B．The Rocky Mountains
C．The Great Mountains
D．Cascade Range
The Backbone of North America refers to the
A．Appalachian Mountains.
B．Rocky Mountains.
C．Cascade Mountains.
D．Sierra Nevada Mountains.
The economic backbone of Canada includes
A．fishing.
B．tourism.
C．agriculture.
D．entertainment industry.
