内蒙古细毛羊是以苏联美利奴羊,高加索羊,新疆细毛羊和德国美利奴羊与当地蒙古羊母羊,采用育成杂交方法育成。()
What did the Dodds do when they went away last summer?
A.They hired someone to stay in their home.
B.They left their pets with neighbors.
C.They rented their house to a student.
D.They asked their gardener to watch their house.
请帮忙给出正确答案和分析,谢谢!
羊性成熟(名词解释)
正常繁殖母羊的生理状态可分为哪几个阶段?
可可脂色价的测定中,显色溶液是()。
A.重铬酸钾水溶液
B.铬酸钾水溶液
C.重铬酸钾硫酸溶液
D.铬酸钾硫酸溶液
请帮忙给出正确答案和分析,谢谢!
Mouthwashes are not effective cure for bad breath mainly because
A.they can"t cover the thick layers of mucus.
B.they can"t get to all the offending bacteria.
C.they can"t mask the bad odor long enough.
D.their strong smell mixes with bad breath and makes it worse.
请帮忙给出正确答案和分析,谢谢!
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