题目

Vancouver(温哥华) Natural Resources As a major centre for the global forestry industry, Vancouver is host to many international forestry conferences and events, and the natural home of the massive BC forestry business. Companies such as Canfor and West Fraser Timber Co., the second and third largest lumber（木材）producers in the world, are headquartered in Vancouver. Vancouver is also a major centre for the mining industry.  International trade International trade is a key part for Vancouver's economy. The city has Canada's largest port and is one of North America's major gateways fo标出句子成分正确的是A.人类语言采用声音作为手段，‖而不采用手势或图画，也不是偶然的。B.（人类语言采用声音作为手段，而不采用）手势或图画，也不是偶然的。C.人类语言采用声音作为手段，而不采用手势或图画，[也不]是偶然的。D.人类语言采用声音作为手段，而不采用手势或图画，也不是〈偶然的〉。