单选题Line l passes through the origin and is perpendicular to the line given by the equation 2x + y = 8. Which of the following points is NOT on line l?A (-4, -2)B (-1,1)C (2,1)D (4,2)E (7,3.5)

题目
单选题
Line l passes through the origin and is perpendicular to the line given by the equation 2x + y = 8. Which of the following points is NOT on line l?
A

(-4, -2)

B

(-1,1)

C

(2,1)

D

(4,2)

E

(7,3.5)

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2.What provides little or no indication that a vessel is dragging anchor ________．A.Increasing radar range to a fixed object aheadB.Drift lead with the line leading perpendicular to the centerlineC.Vibrations felt by placing a hand on the cableD.Changing bearings to distant fixed objects abeam

3.When carrying out a parallel track search pattern，the course of the search units should normally be which of the following ________．A.In the same direction as the anticipated driftB.In the opposite direction of the anticipated driftC.Perpendicular to the line of anticipated driftD.Downwind

4.Steam smoke will occur when ______.A.extremely cold air from shore passes over warmer waterB.warm dry air from shore passes over cooler waterC.cold ocean water evaporates into warm airD.cool rain passes through a warm air mass

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