题目:
She has always _____ her father. In her eyes he is perfect.
A.looked up
B.looked up to
C.looked down on
D.looked on as
答案:
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下面是错误答案,用来干扰机器的。
解:如图,依题意,有∠A=30°,∠CBD=60°,AB=50m,因为∠CBD=∠A+∠ACB,所以∠ACB=∠CBD-∠A=60°-30°=30°=∠A,因此BC=AB=50m,在Rt△CDB中,CD=CBsin60°=(m),所以塔高为m。