持标有下列何种签证的外国人,需要办理居留许可?()
A.D字签证即(定居签证)
B.J-1字签证即(常驻记者签证)
C.Z字签证即(职业签证)
D.以上皆是
参考答案:D
—I cut myself. —You should ________.
A.put some medicine on it
B.drink some hot tea with honey
C.get an X-ray
D.see a dentist
在距离地面15m高处,某人将一质量为4kg的物体以5m/s的速度水平抛出,则人对物体做的功为
A.20J
B.50J
C.600J
D.650J