在1d24h内,任意连续6mill按全身平均的比吸收率(SAR)应小于()W/kG。
参考答案:0.1
总体比例假设检验的基本形式有()。
A.H0:π=π0,H1:π≠π0
B.H0:π≥π0,H1:π<π0
C.H0:π≤π0,H1:π>π0
D.H0:π≠π0,H1:π=π0
E.H0:π>π0,H1:π≤π0
Our class ____ more than 50 students. [ ]
A. builds of
B. is made up
C. consists of
D. is consisted of