7. 有關往復式泵特性，下列敘述何者錯誤？ (A) 啟動時須加入引水 (B) 較強自吸能力 (C) 排出壓力高 (D) 真空建立容易

8. One kind of tools which are in common use for daily maintenance works on the ship is a simple tool designed to insert and tighten, or to loosen and remove, screws. The tool comprises an approximately cylindrical handle to be held by the worker, and an axial shaft fixed to the handle, the tip of which is shaped to fit a particular type of screw. The handle and shaft allow the tool to apply torque. What tool is above description? (A) Hammer (B) Screwdriver (C) Pliers (D) Drill

7. 有關往復式泵特性，下列敘述何者錯誤？
(A) 啟動時須加入引水
(B) 較強自吸能力
(C) 排出壓力高
(D) 真空建立容易

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