【单选题】输出结果是( ) $first = "This course is very easy !"; $second = explode(" ",$first); $first = implode(",", $second); echo $first; ?>
A.
This,course,is,very,easy,!
B.
This course is very easy !
C.
This course is very easy !,
【单选题】关于原发性膀胱输尿管反流与尿路感染间的关系,下列哪项是正确的
【单选题】The word 'geometrically' in the first sentence of the last paragraph means ______ .
【单选题】关于尿路感染,下列哪项不正确()
B.
急性肾盂肾炎肾浓缩功能可下降,但治疗后恢复正常
【单选题】男,28岁,毒性弥漫性甲状腺肿患者,年幼时有哮喘史,以下何种药物为禁忌使用()
【单选题】以下代码运行结果为()。 $first = "This course is very easy !"; $second = explode(" ",$first); $first = implode(",", $second); echo $first;
A.
This,course,is,very,easy,!
B.
This course is very easy !
C.
This course is very easy !,