偏头痛的常见特点不包括（）
A.恶心与（或）呕吐
B.对光和声敏感
C.体力活动时加重
D.单侧
E.发热
参考答案：E
He was busy preparing his lessons, only _________ occasionally to have some tea.[ ]
A. to stop
B. having stopped
C. to have stopped
D. stopping
检查商品主要检查（）。
A.商品数量变化
B.商品是否有异常和移动
C.商品质量变化
D.商品摆放顺序
