【C9】A．contributedB．distributedC．distressedD．disturbed

A．collectedB．distributedC．assignedD．finished

Paychecks______.A．are twice distributed a monthB．twice a month are distributedC．are distri

【C4】A．contributedB．discoveredC．inventedD．generated

The Oscar best actor ______ his success more to luck than to ability.A．contributedB．celebr

【C2】A．contributedB．informedC．spreadD．conceived

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