Theair-conditioners are tested for [defects] before leaving the factory.

[单选题]Theair-conditioners are tested for [defects] before leaving the factory.A.p

[单选题]A．nd the cars are tested for defects before leaving the factory.A．functionsB．faultsC．motionsD．parts

[单选题]Modern machinery______been installed in this newly-built factory.A.has B.ha

[问答题]Please give me your homework before leaving.

[单选题]Don’t forget ________ the window before leaving the room.A.to have closedB.

[单选题]Don't forget _________ the window before leaving the room.A.to have closed

[单选题]The new assembly line having been adopted, the factory produced ____ cars i

[单选题]Don’t forget()the window before leaving the room.出门前别忘了关窗户。A.to have closed

[单选题]A lifeboat is weight tested by lowering to near the waterand loading to capacity with weight evenly distributed. Itis then lowered into the water and released. This test mustbe done at least once every（）.A . 6 monthsB . 12 monthsC . 18 monthsD . 24 m

[单选题]所谓缺陷（Defects）是指（）A .底片因刮伤、擦伤、手纹、污染等造成的显示B .照相技术不良、扭曲、几何形状变化等产生的显示C .物件中属于正常结构以外的不连续状况D .会损害到物件的使用，或超出规范、标准