下列混合物适宜于用过滤法分离的是 [ ]
A.KCl、NaNO3
B.水、酒精
C.Na2CO3、CaCO3
D.MgSO4、ZnSO4
答案:C
根据图片,完成下列句子。
1. My pen pal likes .
2. Does he go to school ?
3. His father likes .
4. Lucy likes .
“出境货物通关单”的有效期,一般货物为( )天。
A.60 B.30 C.21 D.14