单选题In general，the most effective period for observing stars and planets occurs during the darker limit of（）.AsunsetBcivil twilightCnautical twilightDastronomical twilight
单选题
In general，the most effective period for observing stars and planets occurs during the darker limit of（）.
A
sunset
B
civil twilight
C
nautical twilight
D
astronomical twilight
参考解析
解析：
暂无解析
相关考题：
In general, attempts to smooth out period to period resources will _____ the scheduled time and _____ project costs.A.Increase, decrease.B.Increase, increaseC.Increase, increase or decrease.D.Decrease, decrease.E.Decrease, increase.
The most effective team motivator is:A the visibility of the team's contributionB the satisfaction of meeting a challengeC understanding the importance of the projectD the individual's professional challengeE All of the above.
_______ was the most distinguished playwright during the Elizabethan period. A.William ShakespeareB.Francis BaconC.Edmund SpenserD.George Puttenham
Physical exercise is really an effective way of ______ pressure for most people. A. releaseB. releasedC. releasingD. being released
It can be inferred in lesson four that the most effective way of enhancing your interview performance is to keep practicing.()
Her time at the university was the most ________ period of her life.A eventfulB fancifulC insightfulD graceful
Some children spend most of their free time ( ) televisionA.lookingB.seeingC.watchingD.observing
Which of the following security mitigation techniques is the MOST effective against zero－day attacks?() A.Update antivirus definitionsB.MAC filteringC.Effective security policiesD.User awareness training
During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.A.effective cylinder scavenging and coolingB.constant pressure from the turbochargersC.cooler operation of the exhaust systemD.effective constant pressure for turbocharger operation
Which statement about tunnel bow thrusters fitted to large vessels is TRUE ________．A.They are effective on most vessels at speeds up to 10 knotsB.Because of their location，most modern installations have as much power as a tugC.They are fully effective at all draftsD.When going astern at slow speed，they provide effective steering control
In most cases involving spillage of dangerous goods，the most effective response will probably be to ______．A.attempt to repack dangerous goodsB.close all hatches and doorsC.open all hatches and doorsD.wash the substance overboard or jettison it
资料：Think for a moment of your definition of persuasion. If you are like most business people I have encountered, you see persuasion as a relatively staightforward process. First, you strongly state your position. Second,you outline the supporting arguments, followed by a highly assertive, databased exposition. Finally, you enter the deal-making stage and work toward a “close.” In other words, you use logic, persistence, and personal enthusiasm to get others to buy a good idea. The reality is that following this process is one surefire way to fail at persuasion.Persuasion,in fact,involves demands-compromise. Perhaps that is why the most effective persuaders seem to share a common trait: they are open-minded, never dogmtaic. They enter the persuasion process prepared to adjust their viewpoints and incorporate others’ ideas. When colleagues see that a persuader is eager to hear their views and willing to make changes in response to their needs and concerns, they respond very positively.What is the main difference between the “persuasion” of most businesspeople and that of the effective persuaded?A.Most businesspeople see persuasion as a straightforward processB.Unlike most businesspeople effective persuaders are willing to adjust their opinions and hear from othersC.Effective persuaders are open-mindedD.Most businesspeople are more assertive in their persuasion while effective persuaders are more friendly
Which of the following security mitigation techniques is the MOST effective against zero-day attacks?（）A、Update antivirus definitionsB、MAC filteringC、Effective security policiesD、User awareness training
The most modern type of dry cargo carrier is（）.A、multi-purpose shipB、the container shipC、bulk carrierD、general cargo ship
Which of the following is MOST likely the reason a technician would implement software RAID for a SOHO environment？（）A、CPU efficiencyB、High availabilityC、High redundancyD、Cost effective
单选题When the period of beam seas equals the natural rolling period of a vessel，what will most likely occur?（）AExcessive pitchingBExcessive yawingCExcessive rollingDNo change should be evident
单选题Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.Aused for electrical fires onlyBthe smallestCthe most accessibleDthe most effective
单选题Portable foam type fire extinguishers are most effective on（）.Amattress firesBoil firesCwood firesDAll of the above
单选题In observing rig motion while under tow，the period of roll is the time difference between（）.Azero inclination to full inclination on one sideBfull inclination on one side to full inclination on the other sideCfull inclination on one side to the next full inclination on the same sideDzero inclination to the next zero inclination
单选题Which statement about firefighting foam is TRUE?（）AFoam conducts electricityBTo be most effective，foam should be directed at the base of the fireCFoam is most effective on burning liquids which are flowingDFoam can ONLY be used to extinguish class A fires
单选题Which of the following represents the emergency signal for fire aboard ship?（）AMore than six short blasts and one long blast on the whistleBContinuous blast of the ships whistle for a period of not less than 10 seconds supplemented by the same signal on the general alarmCThree short blasts of the whistle supplemented by the same signal on the general alarmDMore than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm
单选题Fire extinguishers used on ship’s are numbered by size I through V，with I being（）.Aused for electrical fires onlyBthe smallestCthe most accessibleDthe most effective
单选题If you hear a continuous blast of the ship’s whistle for a period of a period of not less than 10 saconds supplemented by a continuous ringing of the general alarm bells for not less than 10 seconds,you should go to your（）.Aboat stationBfire stationCman overboard stationDcollision station
问答题Discuss, and decide together: ● What measures are most effective for identifying new export markets? ● How to maintain sales in export markets?
单选题In the Romantic period, _____ is the most prosperous literary form.AproseBpoetryCfictionDplay
单选题In general，the most effective period for observing stars and planets occurs during the darker limit of（）.AsunsetBcivil twilightCnautical twilightDastronomical twilight
单选题From the passage we can infer that.Aexperiments are more or less significant for researches concernedBthe successful experiments result from perfect scientific meansChuman cases are more effective in observing the brain activityDthe result of scientific research should be set aside for a period of time before it’s applied