—John always thinks of others instead of himself.

—So he does. It is________ of him to want to help others.[ ]

A. aggressive  

B. evident

C. typical  

D. conventional

沥青混合料摊铺机必须缓慢、均匀、连续不间断地摊铺，当发现沥青混合料出现明显的（）等现象时，应分析原因，予以及时消除。

A.波浪

B.裂缝

C.轮迹

D.错缝

E.离析