A:tears came to my eye
B:my heart was full of gratefulness
C:my eyes were filled with tear
D:I could hardly hold back my tear
____ ____ the____ !
如图表示某品种狗毛色的遗传图解.请据图回答问题.
已知|a|=8,|b|=6且a+b<0,求2a﹣b的值.