The light from a laser, () in only one direction and () in a narrow beam, is much stronger.A.moves; concentratesB.moving; concentratingC.moving; concentratedD.moved; concentrates
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The supply chain is the flow of () and services from one business to another.A、moneyB、intermediate goodsC、ECD、TPN
A list man would expect to see any of the following light signals EXCEPT ______.A.two red lightsB.one green lightC.one white lightD.one amber light
Where the contract is to insure the subject-matter at and from，or from one place to another or others，the policy is called a ______.A.contract policyB.insurance policyC.time policyD.voyage policy
The ladder shall ______．A.be secured in a position so that it rests firmly against the ship's side from which the discharge operations are carried outB.have at least two replacement steps which are secured in position by a method different from that used in the original constructionC.have battens made of hardwood，or other material of equivalent properties，in one piece and not less thanD.have steps made of softwood，or other material of equivalent properties，made in one piece free of knots，having an efficient slip surface
An overtaking situation at night would be one in which one vessel sees which light(s) of a vessel ahead ?______.A.Masthead lights and sidelightsB.One sidelight, the masthead lights and stern-lightC.Both sidelightsD.Stern-light
Once man began to raise his own animals,he did not have to go out and hunt for his meat.And,since he did not have to move from one place to another hunting for food,man was able to（ ）down and live in one place.A.calm B.get C.come D.settle
