罗纹组织结构。
参考答案:
由正面线圈纵行和反面线圈纵行以一定组合相间配置而成的双面纬编针织物。其结构特点是相邻的正反面线圈纵行相互靠近,彼此潜隐半个纵行。
阅读短文,判断正(T)误(F)。
My best friend is Ann. She is a girl. She has curly hair. She is from America. She has a yellow schoolbag.
What's in it? Two English books, three story-books and a math book. She likes English very much. She likes
music, too.
( ) 1. Ann has curly hair.
( ) 2. Ann has a red schoolbag.
( ) 3. There are ten English books in her schoolbag.
( ) 4. Ann likes music.
( ) 5. Ann is from Canada.
1955年,美国洛杉矶气温高达37.8℃,且持续一周,致使哮喘和支气管流行,老年人死亡率升高,平均每天约死亡70~317人,此即发生的光化学烟雾事件。
光化学烟雾导致的中毒属于()。
A.急性中毒
B.亚急性中毒
C.慢性中毒
D.迟发性反应
E.以上都不是