【简答题】( )位于胸腔内,膈的上方,左、右各一。
【单选题】当测量线路电阻时,数字式万用表显示“110”,则表示
【判断题】使用数字式万用表,测电阻时可以不调零。()
【判断题】数字式万用表测量电阻时,可以不进行调零。
【判断题】生物样品分析中,以标准曲线的最低点作为定量下限()
【判断题】生物样品分析中,以标准曲线的最低点作为定量下限( )
【单选题】Madonna and Michael Jackson are not considered heroes because ______.
A.
they are not clear about the principles they should follow
B.
they are popular only among certain groups of people
C.
their primary concern is their own financial interests
D.
their performances do not improve their fans morally