James plays _____ Miami Heat. He is going to play _______ the players in the Houston Rockets.
A:for; against
B:for; for
C:against; against
D:against; for
人工选择与自然选择的主要区别中,不正确的是( )
一个正三棱锥的四个顶点都在半径为1的球面上,其底面的三个顶点在该球的一个大圆上,则该正三棱锥的体积为( )
—Where did you go last holiday?
—I ____ to the Great Wall.
学校是我们____和____的地方,我爱我的学校。