对薄壁弯曲件,如弯曲半径过小则会引起()
A.裂纹
B.飞边
C.回弹
D.拉穿
参考答案:A
在今年央视3 ·15 晚会上,苹果公司在售后服务中针对中国用户实施双重标准行为遭到曝光。苹果公司的这一行为侵犯了消费者的 [ ]
A .维护尊严权
B .财产所有权
C .自主选择权
D .依法求偿权
Modern China is experiencing a completely new period ________ respect for science and creativity
has become the guiding principle of society.[ ]
A. of which
B. where
C. in which
D. that