【C17】A．significantB．vitalC．importantD．importance

【C17】A．freedomB．freeC．somethingD．money

【C5】A．necessaryB．acceptableC．importantD．vital

The______scene of the waterfall is a perfect delight to the eye.A．significantB．dominantC．m

One______symptom of the disease is progressive loss of memory.A．significantB．dominantC．mag

【C4】A．fundamentalB．vitalC．basicD．radical

具有怎样结构的甾体激素类药物可用四氮唑比色法测定（)。A C17－a－甲酮基B C17－a－ 醇酮基C C20 －