题目

As nobody here knows what is wrong with the machine, we must send for an engineer to _________ the problem. A . handle B . raise C . face D . present 答案：A10．化简求值：（lg5）2+lg2•lg5+lg20-$\root{4}{{{{（-4）}^2}}}•\root{6}{125}+{2^{（1+\frac{1}{2}{{log}_2}5）}}$．