What should be used to steer an open lifeboat if the rudder becomes lost or damaged?（）

[单选题]What type of extinguisher should be used for an electric fire? ________A．CO2B．FormC．WaterD．Water and Form

[单选题]What kind of cable should be used to establish a trunked line between two Catalyst switches?A．A straight-through cableB．An EIA/TIA-232 serial cableC．An auxiliary cableD．A modem cableE．A cross-over cable

[单选题]Expansion tank should be used to remove （） from cooling water.A . scaleB . sludgeC . chemicalsD . air

[单选题]Head tank should be used to remove （） from cooling water.A . scaleB . sludgeC . chemicalsD . air

[单选题]Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?A．Rollover cableB．Console cableC．Crossover cableD．Straight-through cableE．Serial cable

[单选题]What is used as an indicator of initial stability? （）A . GMB . KGC . KMD . GZ

[单选题]What documentation should a couple with a 7-year-old child carry when they drive a car from Canada to America?A． A BC driver’s license, an Air NEXUS card, and a birth certificate.B． An Air NEXUS card, a U.S. Coast Guard Merchant Marine Document, and

[单选题]A．ccording to the author, what should the Administration do about global warming?[A] Offer aid to build cleaner power plants.[B] Raise public awareness of conservation.[C] Press for further scientific research.[D] Take some legislative measures.

[单选题]What preventative maintenance should be done frequently to diesel engine starting air receivers?（）A . Drain the accumulated moistureB . Test the relief valvesC . Watch the temperature to prevent fluctuations in pressureD . Clean the interior to remov

[单选题]The buyer should open the ______L/C 30 days _____the time of shipment.A . relative．beforeB . relevant．onC . covering, afterD . above, for