世界电影艺术史上第一次大变革是（）。 信息时代。 电子计算机和数字技术时代。 黑白到彩色。 无声到有声。
Windows XP中，（）可打开“输入法属性”窗口。 右键双击输入法图标。 左键双击输入法图标。 右键单击输入法图标。 Alt+F4。
自动放水器水表失灵处理的方法有（）。 清洗水表。 开旁通放水阀排水。 检修扶正器。 清洗阀嘴。
女士用餐前（）。 不要拭去口红，因为动作不雅观。 最好先拭去口红，以免餐具留下口红唇痕。 顺其自然，别人不会留意。
Which of the following statements is true concerning the overall efficiency of air compressors?（） High pressure compressors are more efficient than low pressure compressors。 Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit。 Two stage compressors are generally more efficient than single stage compressors。 The volumetric efficiency is decreased in multistage compressor。
If the broker’s lien of the bill of lading for his charges in respect of goods is not satisfied before the goods have reached their destination，he may have the goods（）home in order to retain his lien on them，and is not liable to any action for so doing.
