Mike often argues ______ his friend _____爱下问搜题

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问题选择题

Mike often argues ______ his friend ______ small things, which makes all of us

very unhappy.

A．with; for

B．to; for

C．to; about

D．with; about

答案

答案：D

选择题

把a、b、c、d四块金属浸入稀H₂SO₄中，用导线两两相连可以组成各种原电池。若a、b相连时a溶解；c、d相连时c为负极；a、c相连时，c极上产生大量气泡；b、d相连时，b为正极，则四种金属活动性顺序由强到弱为( )

A．a＞b＞c＞d

B．a＞c＞d＞b

C．c＞a＞b＞d

D．b＞d＞c＞a

问答题论述题

论述铁冒的特征及找矿意义。