∠A与∠B互补，∠B与∠C互余，则∠A一定是( )
A．锐角
B．钝角
C．直角
D．不能确定
答案：B
He was completely______by her tale of hardship.
A．taken away
B．taken down
C．taken in
D．taken up
土壤样品的制备基本程序是（）
A.风干剔杂
B.磨细过筛
C.填写标签
D.装瓶贮藏
