印度尼西亚默拉皮火山2006年5月15日再次喷发,科学家认为火山喷发的岩浆源于
A.地壳
B.软流层
C.下地幔
D.地核
答案:B
I haven't read ____ of his books, but judging from the one I have read I think he's a very promising writer. [ ]
A. any
B. none
C. both
D. either
从事生产、经营的纳税人,应当自领取营业执照之日起()日内申报办理税务登记。
A.20
B.30
C.50
D.60