A:2.5∈M
B:0⊆M
C:∅∈M
D:集合M是有限集
以下行为能正确体现合作与竞争关系的是( )
由四舍五入法得到的近似数8.8×103,下列说法中正确的是( )
补全表格申所缺信息。
People
Things they did
Time
Places
Jane
Helped kids____
Every Friday
In the club
Sam
Helped to give food to the poor
On Thanksgiving Day
In a local____
Paul
Helped to____
On Clean-up Day
In a local park
Alice
____
At a local animal house
选出下列划线字注音完全正确的一项( )