题目

在课外实践中,小明为了测量江中信号塔A离河边的距离AB,采取了如下措施: 如图在江边D处,测得信号塔A的俯角为40,若DE=55米,DE⊥CE,CE =36 米,CE平行于AB,BC的坡度为i=1:0.75,坡长BC=140米,则AB的长为( ) (精确到0.1米,参考数据: , , ) A . 78.6米 B . 78.7米 C . 78.8米 D . 78.9米 答案:CI feel sure that ______ qualification, ability and experience, you are suited to the position we have in mind. A. on account of  B. in terms of    C. on the basis of  D. in the light of
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