I like chicken and vegetables for lunch and my brother _______ likes them.
A:too
B:also
C:either
D:as well
若向量a→=(1,1),b→=(2,5),c→=(3,x).
(1)若b→∥c→,求x的值;
(2)若(8a→﹣b→)•c→=30,求x的值.
常见的表达方式主要有:____