腋测法测量体温的正常值为
A.36.3℃~37.2℃
B.36.5℃~37.7℃
C.36℃~37℃
D.35.8℃~36.8℃
E.36.8℃~37.8℃
参考答案:C
与电容器串联的电抗器是起限制()和()的作用。
If r and s are positive integers,each greater than 1,and if 11(s-1)=13(r-1),what is the least possible value of r+s ?()