— Excuse me, could you tell me _______?
— There's an e-shop on the third floor. You can make it there.
A:how to arrive the e-shop
B:how can I go to the e-shop
C:where I can have my IPod repaired
D:which was the way to the e-shop
没有根茎叶等器官分化的植物是( )
如图为一物体做直线运动的v﹣t图像,根据图像做出的以下判断中,正确的是( )
如图所示,装置竖直放置,上端是光滑细圆管围成的圆周轨道的一部分,半径为R(圆管内径<<R),轨道下端各连接两个粗糙的斜面,斜面与细圆管相切于C,D两点,斜面与水平面夹角为53°,两个斜面下端与半径为0.5R的圆形光滑轨道连接,并相切于E,F两点.有一质量m=1kg的滑块(滑块大小略小于管道内径),从管道的最高点A静止释放该滑块,滑块从管道左侧滑下,物块与粗糙的斜面的动摩擦因数μ=0.5,(g=10m/s2,sin53°=0.8,cos53°=0.6),则( )