正确答案: D

元素周期律是元素原子核外电子排布周期性变化的结果

题目：下列说正确的是

解析：D

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学习资料的答案和解析：

[单选题]

while

[单选题]Just use this room for the time being, and we’ll offer you a larger one ____it becomes available.

as soon as

[单选题]What does the pa mge mainly diseuss?

Modem teehnology and its influenec

[单选题]We only had ＄100 and that was _______ to buy a new computer.

nowhere near enough

[单选题]茄、番茄花药开裂方式是( )。

孔裂

[单选题]地钱的叶状体腹面(下面)的假根和鳞片具有吸收养分、保存水分和固定植物体的功能。( )

正确

[单选题]具( )子房为多室子房。

中轴胎座

[单选题]移栽菜苗时，一般将根除掉一截，目的是除掉顶端优势，促进侧根的发生。( )

正确

[单选题]苔藓植物的孢子萌发首先形成( )。

原丝体