可摘局部义齿的部件包括( )
A．间接固位体B．冠内固位体C．Ⅰ杆D．邻面板E．以上均是
参考答案：E
He hid himself behind the door _____ he still could see what would happen to his classmates.
A．there
B．which
C．from which
D．from where
A．0～t1时间内F的功率逐渐增大
B．t2时刻物块A的加速度最大
C．t2时刻后物块A做反向运动
D．t3时刻物块A的动能最大
