下列各项，不属月经先后无定期肾虚证主要症状的是
A．经行或先或后
B．月经量少色淡黯
C．小腹冷痛拒按
D．头晕耳鸣腰痛
E．舌淡苔白，脉细弱
参考答案：C
In a sample of 800 high school students in which all students are either freshmen, sophomores, juniors, or seniors, 22 percent are juniors and 74 percent are not sophomores. If there are 160 seniors, how many more freshmen than sophomores are there among the sample of students ？（）
A. 42
B. 48
C. 56
D. 208
E. 256
法律是由国家制定或认可并以国家强制力保证实施的、反映由特定社会物质上活条件所决定的统治阶级意志的规范体系。从社会主义法律所体现的意志看，它早现出
A．阶级性
B．普遍性
C．阶级性和普遍性的统一
D．阶级性和人民性的统一
