薄膜衣中加入增塑剂的机制
A.提高衣层的柔韧性,增加其抗撞击的强度B.降低膜材的晶型转变温度C.降低膜材的流动D.增加膜材的表观黏度E.使膜材具有挥发性
参考答案:A
What a(n) _______ it is that the new couple were born in the same year and on the same day.
A.acquaintance
B.consequence
C.circumstance
D.coincidence
红葡萄酒的供酒温度为16—18度,一般倒至中玻璃杯的()。
A.1/4处
B.1/3处
C.1/2处
D.2/3处