商品包装造型的主要形式有方形的箱、不定形的袋和圆柱形的桶等。
参考答案：对
_____ for your laziness, you could have finished the assignment by now.[ ]
A. It were not
B. Were not it
C. Had it not been
D. Had not it been
某男性22岁，于主动脉瓣第二诊区闻及舒张期吹风性杂音，以下哪项体征对其诊断最有帮助（）
A.心尖区舒张期震颤
B.P2亢进并分裂
C.交替脉
D.心界向左侧扩大
E.血压为20.4／5.3kPa（154／40mmHg）
