已知 e 1 、 e 2 、 e 3 为不共面向量,若 a = e 1 + e 2 + e 3 , b = e 1 - e 2 + e 3 , c = e 1 + e 2 - e 3 , d = e 1 +2 e 2 +3 e 3 ,且 d =x a +y b +z c ,则x、y、z分别为______.
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【单选题】What's the impact of the line going down?
A.
The system is in good condition.
B.
It puts extra stress on the system to pick up that line.
【单选题】听力原文:W: We'd better be looking for sales on down jackets and underwear. It's going to be really cold this winter: M: Well, you didn't expect it to be warm, did you.'? W: of course not, but I just hear...
【单选题】听力原文:W: We'd better be looking for sales on down jackets and underwear. It's going to be really cold this winter. M: Well, you didn't expect it to be warm, did you? W: Of course not, but I just heard ...
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