明清时期，苏州、杭州和景德镇出现资本主义萌芽的共同标志是
A：“机户出资，机工出力”的“机房”出现
B：行业分工和生产过程的分工非常细密
C：官营手工业占据优势，迅速发展
D：商品生产过程中劳资双方雇佣关系的确立
根据Jack的日程表，完成选择填空。
Mon
4:00-5:00pm
swimming class
Tue
7:00-9:00pm
meet Sam at his house
Wed
10:00-12:00am
Thu
10:00am
go to the airport to meet Mike
Fri
12:00-5:00pm
part-time job
Sat
10:00-10:30am
visit Uncle David at People's Hospital
birthday party for Tom
Sun
12:00-6:00pm
（21+2）÷（-23）= ____
直接写出计算结果．
6.7+4.3=____
0.32=____
12 ÷23 =____
3%×5%=____
8÷0.02=____
23 ﹣ 14 =____
12×13÷12×13 =____
3a×4a=____
