题目:
沙丁胺醇属于
A.茶碱类
B.β2受体激动剂
C.抗胆碱能类
D.糖皮质激素
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A解析: 根据文中倒数第二段的内容“Without the Americans.the Oxford crew was immediately considered a lost cause.Cambridge were overwhelming favorites to win.”可知,人...