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种子物理特性-(种子散落性、自动分级)

Authored by 娇 管

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University

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种子物理特性-(种子散落性、自动分级)
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12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

种子散落性的主要指标是(

密度和湿度

静止角和自流角

 净度和完整度

温度和光照

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

种子水分含量越高,静止角的变化趋势是

越大,散落性越差

越小,散落性越好

无规律变化

与水分无关

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

种子输送时,输送带的坡度应( )静止角,以防止种子下滑。

大于

小于

等于

无关联

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

种子自流角的大小受以下哪些因素影响?( )

斜面的性质

种子水分

种子颜色

种子完整度

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

种子散落性好的条件包括(

种子大且圆滑

含轻浮杂质多

水分含量低

贮藏中未吸湿发热

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

自动分级现象的发生主要与哪些因素有关?(

种子密度不同

种子散落性不同

种子颜色差异

种子大小一致

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

静止角和自流角越小,种子的散落性越差。(

正确

错误

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