[单选]
Given:

Which statement is true?（）

A . The code will compile without changes.
B . The code will compile if public Tree() { Plant(); } is added to the Tree class.
C . The code will compile if public Plant() { Tree(); } is added to the Plant class.
D . The code will compile if public Plant() { this("fern"); } is added to the Plant class.
E . The code will compile if public Plant() { Plant("fern"); } is added to the Plant class.

An administrator has received complaints from users that an application is not available while other applications run. This application resides on an NFS mounted filesystem. Which of the following commands should be run as a reasonable first step to handle this problem？（） df。 showmount。 exportfs。 refresh -g nf。若随机变量，且已知，从中随机抽取样本，则由估计μ的置信区间时所依据的统计量为（）。 z。 χ²。 t。 F。 A retail customer installs a BladeCenter into an existing 10/100 Ethernet network. Due to cost considerations， the customer uses Copper Pass-thru Modules. After installing this solution， the customer finds that they have no network connectivity. Which is causing the problem of the following？（） Copper Pass-thru Modules only support 1000Mb line speeds.。 Spanning Tree has been enabled on the Copper Pass-thru Module.。 The customer does not have the latest firmware loaded on the Copper Pass-thru Module.。 The customer is using LS21 Blade。给水应监督的项目有（）硬度。二氧化硅含量。碱度。 PH值。溶解氧含量。氯根。 What command can be used to make all mountable filesystems available for use?（） mount -a。 automount all。 varyonvg -m -a。 run the /etc/filesystems script。

Given:

Which statement is true?（）

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[单选] Given: Which statement is true?（）

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[单选]
Given:

Which statement is true?（）