单项选择题The Greeks call sharks 'hounds of the sea' because____________.A.they can follow a scent just like dogsB.they can move swiftly under the seaC.they are hostile to diversD.they have very strong basic instincts
单项选择题可压缩流体的连续性方程为( )。 A、ρvA=C B、vA=C C、ρvAT=C D、vAT=C
