x3-x2+14x
=x(x2-x+14)(提取公因式)
=x(x-12)2(完全平方公式).
Entering the house we found him lying on the bed with his mouth _______ and eyes _______.
A.open, close
B.opened, closed
C.opened, close
D.open, closed
防止船舶油污检验是指150总吨及以上的油船和400总吨以上的非油船应接受()检验。
A、初次检验、定期检验、附加检验、法定年度检验
B、初次检验、定期检验、期间检验、附加检验
C、初次检验、定期检验、期间检验、附加检验、法定年度检验