A:—Do you play football on Monday?—No, I don't .I go shopping.
B:—Do you play football on Monday?—No, I don't .I go swimming.
为提高西欧国家在国际上的地位和作甩,欧洲对外尽量“用一个声音说话”。由此( )
把a-1a的根号外的因式移入根号内得 ( )