— I'm afraid I have to give it up．

— Don't be discouraged. Remember _____ sticks to his work will succeed one day．[ ]

A. anyone    

B. who        

C. no matter who    

D. whoever

当车胎气压低并行驶在高速公路上时，车胎背面所产生的裂纹、车胎内部的发热、龟裂，以及最后使车胎爆裂的现象是（）？

A.制动性能下降现象

B.汽塞现象

C.驻波现象

D.打滑现象