若一个数的平方根与它的立方根完全相同,则这个数是( )
A:0
B:1
C:-1
D:±1,0
Football
People call it “the first sport in the world”. There are two teams in the football field during a game. Each team has eleven players.
Tennis
There is a big net in the middle of the court(球场). Each player has a racket(球拍)in his hand. Two or four players can play it together.
Golf(高尔夫球)
Golf comes from Scotland. It means green, oxygen, light and foot. People play it on the outdoor grass. They hit the white balls into the small holes with a stick.
Basketball
America is the hometown of basketball. This sport is famous for NBA.
There are two teams with ten players on the basketball court. They can't run with the ball in their hands.
读下面世界地图,按要求答题。
当手不慎被针刺到,会缩手并形成痛觉.发生这种反射和形成痛觉的先后顺序是( )