题目内容
（请给出正确答案）
提问人：网友bingleng9900
发布时间：2022-01-07
[主观题]
The primary purpose of the passage is toA．point out that theories about the functioning of
The primary purpose of the passage is to
A．point out that theories about the functioning of olfactory sensation have failed to change despite experimental inquiry
B．suggest means by which the impact of odors that irritate human subjects may eventually be lessened
C．describe the attempt of scientists to understand the degree to which odor perception is learned or innate
D．demonstrate that efforts to understand the psychobiological basis for human perception is too difficult for modern laboratory techniques
E．describe how the emotional pairing process in odor sensation can lead to the experience of irritation
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
查看官方参考答案
代码如下，请将第10行标号处缺少的语句填写完整。#include <stdio.h> #include <stdlib.h> #include <math.h> #define EPS 1e-6 int main() { float a, b, c, disc, p, q; printf("Please enter the coefficients a,b,c:"); scanf("%f,%f,%f", &a, &b, &c); _________________________________ /* a=0时，输出"不是二次方程" */ { printf("It is not a quadratic equation!\n"); exit(0); /* C标准库函数，用于终止整个程序的执行，强制返回操作系统 */ } disc = b * b - 4 * a * c; /* 计算判别式 */ p = - b / (2 * a); q = sqrt(fabs(disc)) / (2 * a); if (fabs(disc) <= eps) * 判别式等于0时，输出两相等实根 { printf("x1="x2" %.2f\n", p); } else if (disc> EPS) /* 判别式大于0时，输出两不等实根 */ { printf("x1 = %.2f, x2 = %.2f\n", p+q, p-q); } else /* 判别式小于0时，输出两共轭复根 */ { printf("x1 = %.2f+%.2fi, ", p, q); printf("x2 = %.2f-%.2fi\n", p, q); } } return 0; }
