比赛时接对方发球员的球叫()。
A、接球
B、接发球
C、挡球
参考答案:B
先化简,后求值:(2a﹣3b)(3b+2a)﹣(a﹣2b)2,其中a=﹣2,b=3
He would like to trek the jungle, because he likes exciting vacations. [ ]
A. through
B. across
C. cross
D. over