短路的形式：（）、两相短路、单相短路。
参考答案：三相短路
纳税人因住所、经营地点变动而涉及改变（）的，应当在办理变更或注销工商登记前或者住所、经营地点变动前，向（）申报办理注销税务登记，并在30日内向（）申请办理税务登记。
—There is hardly an environment on earth
—Some species of animals have not adapted successfully.
A．to which
B．in which
C．for which
D．on which
s of animals have not adapted successfully.