介导Ⅰ型超敏反应的生物活性物质主要是由下列哪一种细胞释放()
A．巨噬细胞
B．单核细胞
C．肥大细胞
D．B细胞
E．中性粒细胞
参考答案：C
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The Bank of China, having so far woven its network in 27 countries, ______ its business in Brazil in June 2009.
A．has started
B．was starting
C．will start
D．started
水泵的最大安装高度
The Bank of China, having so far woven its network in 27 countries, ______ its business in Brazil in June 2009.