高压式储存的二氧化碳灭火系统管网起点计算压力(绝对压力)为()。
A、1.00MPa
B、1.40MPa
C、2.07MPa
D、5.17MPa
参考答案:D
某人背对路灯离路灯1m处时,影长为2m,他再往前走2m时,影长为______m.
—Why were you angry with Mike this morning?
—Because he took my bike .
A.by asking for permission
B.without permission
C.by telling me
D.with permission