学习权
参考答案：是指学生有权利在义务教育年限内在校学习，在教育教学过程中，教师不得以任何借口随意侵犯或剥夺学生参加学习活动，诸如听课、作业等的权利．
My car’s performance is ___ since the engine’s been tuned and the tires have been changed．
A．better as twice
B．twice as the condition
C．twice as good
D．twice as better
()降低物流成本,提高服务水平是物流系统优化的目标。
A．正确
B．错误
