为小儿作PPD试验,皮内注射皮丘直径为
A.1mm~3mm
B.3mm~5mm
C.6mm~10mm
D.10mm~12mm
E.13mm~15mm
参考答案:C
Many people in the city wonder _____the city officials have the information they need to solve the problem.
A.that
B.whether
C.what
D.which
在计算dc指数时,钻头的使用情况对资料的选取不产生影响。()