讨论当x>0时,方程
的根的个数.
参考答案:[解]
[*] [*]
_____ he exercises every day, _____ he is not very healthy. [ ]
A. Althoug; but
B. Though; so
C. Though; /
D. Because; /
在比赛口令“开始”前或“停”后进攻对方,此行为属于种()
A、技术犯规
B、禁用方法
C、侵人犯规