如图所示的螺旋测微器的读数为__________mm。
3.800或3.801
隋朝定都长安，古长安是指今天的哪个城市( )。
A．开封B．咸阳C．西安D．南京
Upon completing his examination over the patient, the doctor offered his judgment of her conditions.
A．of
B．off
C．about
D．around
