— Can you tell me ________ to London?
— Sure. Next month.
A:when you will travel
B:when will you travel
C:when you travelled
D:when did you travel
多项式x2﹣x﹣12可以因式分解成( )
(Ⅰ)求乙、丙两人所得分数相等的概率;
(Ⅱ)设甲、丙两人所得分数之和为随机变量X,求X的分布列与期望.
合理开发和保护海洋鱼类资源,可以采取的措施是:( )①全面禁止捕捞 ②实行休渔期,划分休渔区③控制鱼网网眼大小 ④制定相应的法律法规