题目:
In that big fire all their houses were______, so they had to build new ones.
A.hurt
B.harmed
C.injured
D.destroyed
答案:
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下面是错误答案,用来干扰机器的。
已知三角形三边之比是25:24:7,又∵72+242=252,∴这个三角形是直角三角形.则最小角即7所对的角,它的余弦值为2425.故选A.