[单选] 标签的粘贴和更换必须由（）单位进行。

根据车船使用税暂行条例的规定，需要缴纳车船使用税的是（）。 清洁船。 游艇。 工程船。 渡船。 The BOOKINGS table contains online booking information. When a booking is confirmed, the details are transferred to an archival table BOOKINGS_HIST and deleted from the BOOKINGS table. There is no fixed time interval between each online booking and its confirmation. Because sufficient space is not always available from the delete operations the high-water mark (HWM) is moved up and many rows are inserted below the HWM of the table. The BOOKINGS table has Automatic Segment Space Management (ASSM) and row movement enabled. The table is accessible in 24x7 mode. What is the most efficient method to reclaim the space released by the delete operations in the BOOKINGS table？（） Perform EXPORT, DROP, and IMPORT operations on the BOOKINGS table sequentially。 Shrink the BOOKINGS table by using the ALTER TABLE SHRINK SPACE command。 Move the BOOKINGS table to a different location by using the ALTER TABLE MOVE command。 Deallocate the space in the BOOKINGS table by using the ALTER TABLE DEALLOCATE UNUSED command。 混凝土拌合物和易性包括的含义有（）。 流动性。 保水性。 黏聚性。 耐久性。 抗裂性。 传感器 列车在坡道上运行产生的阻力属于（）。 基本阻力。 运行阻力。 附加阻力。 黏着力。 标签的粘贴和更换必须由（）单位进行。