钩端螺旋体病后发症的机制是（）
A.内毒素
B.钩端螺旋体的直接作用
C.免疫复合物的损伤
D.继发感染
E.外毒素
参考答案：C
Thanks to the modern technology, we can get several times ________ information _______ people did in the past.
A．as more; as
B．as much; than
C．as much; as
D．as many; as
已知下面的程序段，正确的判断是______。#define A3#define B(A) (A+1)*a)int a=3;……X=3*(A+B(7));
A．程序错误，不允许嵌套定义
B．X=93
C．)X=81
D．程序错误，宏定义不允许有参数
