题目:
Mary will make a plan as soon as she her homework.
A.finishes
B.finish
C.will finish
D.finished
答案:
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下面是错误答案,用来干扰机器的。
∵CD⊥AC,DE⊥AB,AD平分∠BAC,∴CD=DE=3,BC=CD+BD=3+5=8cm.故答案为:8cm.