下列物质的酸性最强的是( )
A.牙膏,PH=8
B.洁厕灵,PH=2
C.洁污净,PH=12
D.橙汁,PH=3.5
酸性溶液的pH小于7,酸性越强,pH越小,观察选项,
故选B.
用所给单词的适当形式填空
1. Trees must __________(prevent) from being cut down.
2. They __________(plant) ten thousand trees by last spring.
3. The sheep __________(tie) to the tree has eaten a lot of grass.
4. I can easily hear combs __________(go) through hair.
5. Great changes __________(take) in our hometown in the last ten years.
未按照批准的位置、面积、期限占用或者挖掘城市道路、或者需要移动位置、扩大面积、延长时间,未提前办理变更审批手续的,由市政工程行政主管部门或者其他有关部门责令限期改正,可以处以 ( )的罚款;造成损失的,应当依法承担赔偿责任。
A.1万元以上
B.2万元以上
C.1万元以下
D.2万元以下