【单选题】以下标记( )不可以作为PHP代码的开始标记。
【单选题】The author suggests that the approach of physicists to solving scientific problem is which of the following?
A.
Practical for scientific purposes.
B.
Detrimental to scientific progress.
C.
Unimportant in most situations.
D.
Expedient, but of little long-term value.
【单选题】下列二十四节气中,全部反映气候变化的是() 选择一项:
【单选题】6-40.下列二十四节气中,全部反映气候变化的是()选择一项:
【简答题】在PHP中,使用正则表达式对数组中的元素进行匹配可以用【 】函数。