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长度为0的字符串称为 空串

A. 对
B. 错

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Canada was divided Into Upper Canada (English speaking) and Lower Canada (French speaking) in ____ ___ and they were united again in _______ .

A. 1791/1840
B. 1775/1791
C. 1840/1867
D. 1775/1867

Canada's early economic development was founded on ___ ____ .

A. resource industries
B. heavy industries
C. light industries
D. manufacturing industries

What law made French the offical language in Canada's Quebec?

A. The Official Language Act.
B. The Charter of the French Language in Quebec.
C. The Meech Lake Accord.
D. The new Canadian Constitution.

Australia has always been a continent with few people mainly because ____ ___ .

Australia is too far away fram Europe
B. Australia is the least mountainous and most level of the world's continents
C. Australia is separated from the rest of the world by seas
D. most of the continent is hot and dry

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