修剃胡须时,由于较粗硬,故刀锋的倾斜角度可稍大些,一般在()范围内接近于斜切。
A.15°~25°
B.20°~30°
C.30°~40°
D.25°~45°
参考答案:D
紫外分光光度法测定硫喷妥钠含量时,1mg的硫喷妥相当于硫喷妥钠的毫克数
A.λmax为240nmB.λmax为255nmC.银量法D.与铜盐的反应E.λmax为304nm
A capsized small sail vessel is best righted when what part of the vessel is downwind?()
A.Stern
B.Bow
C.Centerboard
D.Mast