在“五·一”黄金周期间,某超市推出如下购物优惠方案:(1)一次性购物在100元(不含100元)以内时,不享受优惠;(2)一次性购物在100元(含100元)以上, 300元(不含300元)以内时,一律享受九折的优惠;(3)一次性购物在300元(含300元)以上时,一律享受八折的优惠.王茜在本超市两次购物分别付款80元、252元.如果王茜改成在本超市一次性购买与上两次完全相同的商品,则应付款( ).
A:332元
B:316元或332元
C:288元
D:288元或316元
已知函数y=f(x)是定义在R上的增函数,函数y=f(x-1)的图像关于点(1,0)对称。若对任意的x,y∈R,不等式f(x2-6x+21)+f(y2-8y)<0恒成立。则当x>3时,x2+y2的取值范围是( )
Sally: I'm reading a letter from my pen pal.
David: ____
Sally: A girl.
Sally: She has big eyes and curly blonde hair.
David: Is she tall?
Sally: ____ Look at her photo.
David: Oh, she's pretty and thin. ____
Sally: She likes playing the piano.
A. Is your pen pal a boy or a girl?
B. What does she like?
C. What does she look like?
D. Is your pen pal a girl?
E. What do you do, Sally?
F. No, she's short.
G. What are you doing, Sally?
跨国企业可以根据研发、生产或销售的需要,在其他国家设立分支机构。下图为四个城市产业结构三角坐标图。跨国企业营运总部和制造中心的最佳选址分别是