A.5組、每組測(cè)16s; B.10組、每組測(cè)16s; C.10組、每組測(cè)60s; D.10組、每組測(cè)20s。
A.0.02%/min; B.0.01%/min; C.0.005%/min; D.0.05%/min。
A.1/3; B.1/5; C.1/10; D.1/8。