【简答题】某设备上真空表的读数为 13 . 3 ×10 3 Pa, 试计算设备内的绝对压强与表压强。已知该地区大气压强为 98.7 ×10 3 Pa 。 2. 某流化床反应器上装有两个 U 型管压差计,如本题附图所示。测得 R 1 = 400 mm , R 2 = 50 mm ,指示液为水银。为防止水银蒸汽向空气中扩散,于右侧的 U 型管与大气连通的玻璃管内灌入一段水,其高度 R 3 = 50 mm 。试求...
【简答题】Wecan infer from the passage that yoga [A] has been popular ever since itsadvent in India. [B] is an ancient Hindu practice ofmeditation. [C] focuses on improving muscularstrength. [D] is becoming inc...