【C17】A．respectB．despiseC．mockD．sneer

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 －

【C16】A．respectB．happinessC．friendshipD．praise

Extract 1, 2 and 3 all imply the importance of______..A．self respectB．understandingC．flexi

_________（47）A.it can be a sign of respectB.they

_________（48）A.it can be a sign of respectB.they

_________（49）A.it can be a sign of respectB.they