A:good, for
B:well, at
C:well, with
D:good, with
Tom is looking forward to ____ (lie) on the beach to enjoy the sunshine.
在△ABC中,已知D是AB边上一点,若AD→=2DB→,CD→=13CA→+λCB→,则λ=( )
实数m取什么值时,复数(m2﹣5m+6)+(m2﹣3m)i是
(1)实数;
(2)虚数;
(3)纯虚数.