脉搏血氧饱和度测量原理是氧合血红蛋白对哪类波长的红外线吸收量大()
A.660nm
B.760nm
C.940nm
D.880nm
E.600nm
参考答案:C
An analyst does research about common probability distributions. Which of the following provides the probability of a range of outcomes()
A. Probability function.
B. Probability density function.
C. Bernoulli function.
从以下特征,可以判定是活塞敲缸响:()。
A.温度低时响声明显,温度正常时,响声减弱
B.与发动机温度变化无关
C.单缸断火,响声减弱
D.排气管烟色发蓝
E.打开加机油口盖,加油口冒烟