影响育种值估计准确度因素

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影响育种值估计准确度因素

考点:动物育种学动物育种学题库
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()是教学内容的载体,是教学内容的表现形式,是师生之间传递信息的工具。

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如图所示,倾角为30.的粗糙斜面固定在地面上,物块在沿斜面方向的推力F的作用下向上运动已知推力F在开始一段时间内大小为8 5N.后来突然减为8N,整个过程中物块速度”随时间变化的规律如图所示,取重力加速度g=10m/f,求:

(1)物块的质量m;

(2)物块与斜面间的动摩擦因数μ.

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道库恰耶夫成土因素学说的基本观点。

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预防破伤风最可靠的方法是()

A.正确处理伤口

B.被动免疫

C.自动免疫

D.综合治疗

E.清除坏死组织

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The client asks when he can stop taking the eye medication for his chronic open-angle glaucoma. Which would be the nurse’s best response()

A. "You can stop using the eye drops when your vision improves. "

B. "You Need to use the eye drops only when you has symptoms. "

C. "You can discontinue the eye drops after 2 months of normal eye examinations. "

D. "You must use the eye medication for the rest of his life. "

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