A:why he is not here
B:where Julia went last weekend
C:what time is it
D:how did my brother do it
有关日本经济的说法,错误的是:
人的情绪多种多样,但有四种是最基本的。这四种是( )
已知方程组2x+y=4x+2y=5,则x+y的值为 ____.