A:物体漂浮,浮力为12N
B:物体悬浮,浮力为10N
C:物体漂浮,浮力为10N
D:物体沉底,浮力为12N
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
所有与赤道平行的圆圈叫纬线, ____ 是最大的纬线圈.
秦岭—淮河线南北两侧的地理差异明显,下列关于这种差异的叙述错误的是( )