题目

 Buses here are always crowded with passengers, so I prefer _____ there rather than take a bus.    A. cycle            B. cycling           C. to cycle          D. being cycled 答案：C在制作洋葱表皮细胞临时装片时，错误的操作时（ ）A．将盖玻片的一侧先接触液滴，再快速盖上B．将盖玻片的一侧先接触液滴，再缓缓盖上C．在载玻片中央先滴一滴清水D．将碘液滴在盖玻片左侧，用吸水纸从对侧引流