某废品收购站严重违规收购废旧金属,当地公安机关查实后依法吊销了由其颁发的许可证。( )
参考答案:对
In my opinion, it is a good way for us to memorize new words by seeing them _______. [ ]
A. properly
B. repeatedly
C. clearly
D. usually
氢气球下吊着一个小重物G在空中匀速运动.重物运动的方向如图中箭头所示的虚线方向.不计空气阻力和风力对重物G的影响.则图中气球和重物G在运动中所处的位置是( )
A.
B.
C.
D.