在培训需求分析中，针对企业内各个职位所进行的分析是（）
A、人员分析
B、任务分析
C、组织分析
D、工作分析
参考答案：B
—What was it like when you were in France ?
—My host family is really nice. They ______ to make me feel at home.[ ]
A. made up their mind
B. gave compliments
C. made a toast at dinner
D. went out of their way
在170C时，400Hz带宽的热噪声大约是（）dBm。
A.-121
B.-148
C.-151
D.-174
