计算平面图形对Z轴的静矩，该静矩与（）无关。 ["Y轴平移","Z轴平移","图形转动","坐标系转动"]
（）具有吸收、固着、输导、合成、贮藏和繁殖等功能。 ["A、根","B、茎","C、叶","D、花"]
3.5英寸高密度软盘容量为（） ["720K","1.2M","1.36M","1.44M","360K"]
无线网优内容主要包括（）. ["无线空口信号侧优化","承载无线数据的有线侧优化","无线用户容量优化","无线网络安全侧优化"]
计算机的发展大概分为（） ["2个阶段","3个阶段","5个阶段","4个阶段","都对"]
矿，焦界面层阻力损失约占整个（）带阻力损失的20%～35%，对减少粉末如炉极为重要.
