单项选择题

A.≤0.680g/cm³，≤2ppm
B.≤0.180g/cm³，≤5ppm
C.≤0.380g/cm³，≤10ppm
D.≤0.880g/cm³，≤0.5ppm

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A.≥99.5％，≤7ppm
B.≥97.5％，≤2ppm
C.≥95.5％，≤3ppm
D.≥98.5％，≤5ppm

A.100℃
B.107℃
C.98.53℃
D.60℃