题目内容

血流速度增快，流量加大，彩色多普勒显像的血流信号：（）。

A. 亮度提高
B. 亮度降低
C. 亮度不定
D. 亮度变换不定
E. 无法观察亮度

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人体中不同组织和体液回声强度通常的分级是：（）。

A. 强回声，高回声，低回声，无回声
B. 强回声，高回声，无回声
C. 强回声，无回声
D. 强回声，低回声
E. 高回声，无回声

如何利用频谱多普勒判断动脉血流：（）。

A. 血流频谱为连续不断的波形
B. 血流频谱为博动性尖峰脉冲波形且频谱速度高
C. 血流频谱速度低
D. 血流颜色为红色
E. 血流频谱速度高

进制转换。题目描述题目内容：编写程序，输入一个八进制数（不超过3位），输出该数对应的十进制数。输入样例：17输出样例：17(8)=15(10)输入样例：111输出样例：111(8)=73(10)

1) The Master said, “To learn _____ is unavailing. To think _ is dangerous.”2) The Master said, “The superior man is _ in his speech, but in his actions.”3) The Master said, “The wise take joy in water; the humane take joy in mountains. ; the humane are tranquil. The wise enjoy; __.”4) The Master said, “Walking along with three people, my teacher is sure to be among them. I choose what is good in them and it and what is not good and _ it.”5) The Master said, “They are not equal to those who love it, and they who love it are not equal to those __.”