A 2和2 B 2和4 C 4和2 D 4和4

A 钠 B 硝酸银溶液 C 硫酸亚铁溶液 D 氢氧化钠溶液

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152011421142.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/2013011115200720720.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152082168216.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152020972097.jpg" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152092369236.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152012191219.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152028072807.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152060076007.jpg" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152453145314.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152466396639.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/2013011115250713713.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152552415241.jpg" alt="" border="0" />

A pH=4的溶液 B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152553605360.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152559925992.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111152636953695.jpg" alt="" border="0" />

A 铁生锈 B 从液态空气中分离氧气 C 二氧化碳气体变成干冰 D 矿石粉碎

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154058785878.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154084558455.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154042594259.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154033023302.jpg" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154078017801.jpg" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154050035003.jpg" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154027232723.jpg" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130111154086798679.jpg" alt="" border="0" />

A 降温、减压 B 升温、加压 C 降温、加压 D 升温、减压