If two fuel service tanks are installed, the empty tank should be pumped up directly it is emptyWhat is the meaning of “directly” in the sentence above?()
A tank which is NOT completely full or empty is called().
After leaving the port, we used ()to clean the empty holds and decks.
Given the following script, why does the output come out as an empty line instead of "dog"?()
A tank which is not completely full or empty is called().
简述isset()和empty()的区别
在执行命令STORE.NULL.TOX后,命令?X,ISNULL(X),EMPTY(X)的输出结果是()。
Given the following script, why does the output come out as an empty line instead of "dog"()#!/bin/ksh $VAR=dog echo "${VAR}"
Given that the current directory is empty, and that the user has read and write permissions, and thefollowing: Which statement is true?()
Which of the following commands is used to delete an empty directory?()