She is a kind and ________ grandmother. [ ]
A. love
B. loves
C. loving
D. to love
答案:C
能爬台阶,拖着玩具转,会自己进食,只能叠2~3块方积木,最可能的月龄是()
A.10个月
B.12个月
C.15个月
D.18个月
E.24个月
石灰碳化后的强度增加,是因为形成了()物质。
A.CACO3
B.CA(OH)2
C.CA2O3
D.CAS