单项选择题
Houses are typically no more than two __and stand alone.()
A.yardsB.blocksC.unitsD.stories
判断题 According to the advertisement,Darren Fischer has experience designing large buildings.
判断题 摄入任何必需氨基酸不足,都可能导致整个氨基酸利用水平下降。
多项选择题 下列属于人体必需脂肪酸的有()