【C9】A．vitalB．casualC．fatalD．subtle

【C7】A．delicateB．sensitiveC．tenderD．subtle

【C20】A．mortalB．rationalC．fatalD．vital

The old man died of a deadly disease.A.riskyB.seriousC.fatalD.worrying

You will be informed about any subtle changes ________ .A at the first opportunityB for

The ________ face sends a strong emotional message: “Do Not Disturb,”a subtle sign us

番泻苷A中两个蒽酮母核的连接位置是（)A.C1—C1B.C2—C2C.C9—C9D.C10—C10E.C9—C10