配制浓度等于或低于()mol/L的标准溶液时,应于临用前将浓度高的标准溶液用煮沸并冷却的水稀释,必要时重新标定。
A.0.06
B.0.04
C.0.02
D.0.01
参考答案:C
—How about your journey to Mount Emei ?
—Everything was wonderful except that our car _________ twice on the way .
A.slowed down
B.broke down
C.got down
D.put down
阵亡将士公墓一共有几座?