扑救影剧院火灾水阵地可设在观众厅中央，但不可设在舞台中央，要以门或承重墙为依托
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WhenBobwokeuphefoundhimselfinhospital,buthedidnt__________.
Therearemanyislands______thecoastofChina.
—Youlookverypale.You__________verytired.—Ididn’tsleepatalllastnight.
设A为3阶方阵，特征值分别为-2，1，1，则|5A-1|=______________.
I'llneverdo______.