问题
填空题
I（）(将在做实验) from three to five this afternoon.
答案
参考答案：will be doing/conducting the experiment
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I（）(将在做实验) from three to five this afternoon.
参考答案：will be doing/conducting the experiment
，三阶矩阵B满足BA=B+2E3，则|B|=( )．