冰楔（ice wedge)
冰楔（ice wedge)
相关考题：
In cold, damp weather, the buildup of ice on airplane wings can pose significant aerodynamic problems. Which of the following effects would you expect?A.As ice builds up on the top of the wing, drag increases.B.As ice builds up on the top of the wing, lift increases.C.As ice builds up on bottom of the wing, lift decreases.D.All of the above
_____ ice cream in the world is more delicious than American ice cream.A: NoneB: NeitherC: NotD: No
A wooden float placed between a ship and a dock to prevent damage to both is called a ______.A.camelB.dolphinC.rat guardD.wedge
You are on an ice-reinforced vessel about to enter packice．You should ______．A.enter the pack on the windward side where there is a well defined ice edgeB.trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcementC.take maximum advantage of coastal leads caused by offshore windsD.look for areas of rotten ice and enter perpendicular to the ice edge
In ice of higher concentrations ______ is not one of the basic applying rules．A.keep movingB.try to work with the ice movement，and not against itC.excessive speed means ice damageD.use full astern as often as possible
单选题The purpose of this passage is to ______.Afrighten people with the rapid melting of the Greenland ice sheetBurge people to take some measures to curb the melting of the Greenland ice sheetCpromote people’s environmental protection consciousnessDlet people know the time the Greenland ice sheet will take to melt
单选题The scientists are not sure_______.Ahow long the ice age lastedBwhere ice sheets melted during the ice ageCwhat caused the temperature changesDwhat the earth is made up of
单选题A wedge of water building up between the bow and nearer bank which forces the bow out and away describes（）.Abank cushionBbank suctionCcombined effectDbend effect
单选题Any friction fit, tightness or adhesion of the part of any load being lifted should be broken by wedge or tapping and not by increasing the load on the applianceAccording to this sentence, （）Athe lifting appliance can always lift the freight within its rated loadBattention should be paid in order not to break the wedge when lifting cargoCsometimes the lifting work needs other assistance other than the lifting applianceDlifting work should be done with every part fit, tightness or adhesion
单选题You are on an ice-reinforced vessel about to enter packice. You should（）.Aenter the pack on the windward side where there is a well defined ice edgeBtrim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcementCtake maximum advantage of coastal leads caused by offshore windsDlook for areas of rotten ice and enter perpendicular to the ice edge
单选题Which of the following is the best title for the passage ?AA computer modelBStudies show ice melted equally in the North and the South during the ice ageCMost of the ice melted in the Northern hemisphere during the 30,000-year long ice ageDA survey result