Too much work and too little rest ____ to his illness.
A.causes
B.forms
C.leads
D.makes
答案:C
蜻蜓点水,这属于生物的哪项特征?( )
A.应激性
B.生长
C.繁殖
D.新陈代谢
在密度测井中,长源矩计数率受泥饼影响(),短源距受泥饼影响()。