【简答题】植物生长发育过程中需要的大量元素有C、H、O、N、P、K、Ca、Mg、S9种,被称为植物营养三要素的是哪三种元素?这三种元素对植物的生长发育分别有什么作用?施用过多或者过少,会出现什么症状?
【单选题】Companies move heaven and earth to recruit and promote the best talent because .
A.
they read the book named “The War for Talent”
B.
companies want to know how to define “talent”
C.
they can’t get enough of it
D.
stocking up on talent seems to protect companies from getting it spectacularly
【简答题】植物营养元素可分为大量元素和微量元素(按需要量划分)大量元素前9种(C、H、O、N、P、K、Ca、Mg、S)微量元素7种(Fe、Mn、B、Cu、Zn、Mo、Cl)。其中的 、 、 三种元素,由于作物需要量比较多,而土壤中可提供的有效量相对比较少,常常须通过施肥才能满足作物生长的需要。因此称为“作物营养三要素”或者“肥料三要素”。
【单选题】Companies move heaven and earth to recruit and promote the best talent because ______.
A.
they read the book named "The War for Talent"
B.
companies want to know how to define "talent"
C.
they can't get enough of it
D.
stocking up on talent seems to protect companies from getting it spectacularly wrong
【单选题】按无符号整数对待,一个字节的二进制数码最大相当于十进制数( )
【简答题】The government will move heaven and earth to solve environmental problems.
【单选题】按无符号整数对待,一个字节的二进制数码最大相当于十进制数()。