Mr. Zhang is mad at the children who often copy others' homework.
A：argues with
B：cares for
C：is angry with
D：is pleased with
①此行何去？赣江风雪弥漫处。
②漫天皆白，雪里行军情更迫。
③命令昨颁，十万工农下吉安。
④头上高山，风卷红旗过大关。
若0°＜α＜90°，则下列说法不正确的是（ ）
