敌敌畏的杀虫效力与气温高低直接相关，气温愈高，杀虫效力（）。
A.愈小
B.无明显变化
C.愈大
D.无
参考答案：C
急性心肌梗塞灶显像
He, _____ in a poor family, became one of the greatest writers in the world.
A．as born
B．that is
C．who is
D．although born
