单项选择题
We wish to receive your shipping advice soon for the goods under the captioned A.letter B.cable C.contract D.communication
未知题型 边长为1.5m的正方形平板放在速度U0=0.9m/s的水流中,分别按全板都是层流或者都是紊流两种情况计算边界层的最大厚度和摩擦阻力。水的运动黏滞系数为ν=10-6m2/s。
未知题型 财政经济稳定职能主要包括( )。A.充分就业B.稳定物价C.国际收支平衡###SXB#
单项选择题 Each time ______ they met they would talk long hours together. A.which B.during C.when D./