减轻四肢骨折疼痛的有效措施()
A.口服止痛药
B.全身麻醉
C.神经阻滞
D.良好制动
E.吸氧
参考答案:D
—Zhang Yining won the l00th gold at the Olympic for China. _______ is she from?
—Beijing. [ ]
A. Who
B. What
C. Where
D. When
在100g浓度为18mol/L、密度为ρ (g/cm3)的浓硫酸中加入一定量的水稀释成9mol/L的硫酸,则加入水的体积为
A.小于100mL
B.等于100mL
C.大于100mL
D.等于100/p mL