在秋季开学之际，山东省“扫黄打非”办公室自2014年9月在全省范围内组织开展为期一个月的校园周边出版物市场专项整治行动，严查各类违禁及非法少儿出版物，严打各类非法制售行为，为青少年健康成长营造良好文化环境。这一专项整治行动体现了对青少年的（     ）

人体的八大系统是____。

如图甲所示，在升降机的顶部安装了一个能够显示拉力的传感器，传感器下方挂上一轻质弹簧，弹簧下端挂一质量为m的小球，若升降机在运行过程中突然停止，并以此时为零时刻，在后面一段时间内传感器显示弹簧弹力F随时间t变化的图象如图所示，g为重力加速度，则下列说法正确的是（   ）

完形填空, 阅读下面短文，掌握其大意，然后在每小题所给出的A、 B、 C三个选项中选出最佳选项，

It was a long hard fight, but by now it was 1and this helped us very much. We ran here and there in the trees, calling and2. The enemies could not see us and did not know how many of us they were 3In the end the first officer shouted to them：                                                  

“Put down your4and stop fighting! The captain has fifty island people to help him. We can kill you 5!”

     So the enemies 6 fighting and we took their guns. Three of the enemies7 to come to join us, but the others refused. So we 8them in my cave. I stayed to 9 the prisoners(犯人), while the captain and his men went back to fight for the ship.

     All night we listened to the 10of guns and shouting, but in the morning, when the sun  11, the captain was master of his ship again. I went down the shore(海岸) to meet him.

“My dear friend” he cried, “There's your12! I’ll take you to the ends of the13in it!” I put my 14round him, and we laughed and cried together. How 15I was to leave the island.