There are usually at least two _____ of looking.
A.means
B.ways
C.directions
D.courses
答案:B
0.017676…这个循环小数可以写作:______.
颅骨软化多见于()。
A.3个月以内
B.3~6个月
C.6个月
D.8~9个月以上
E.12个月