【单选题】Aboard a vessel, dividing the sum of the vertical moments by total weight yields the vessel’s_____.
A.
height of the center of gravity
【单选题】In those hard days , we could not leave behind___________came to us for help.
【单选题】We meant to finish the work by dark, but we were so tired that we could not ______.
【单选题】— __________ we leave the library before 5 o’clock? — No, you needn’t. You can stay here until 5:30.
【单选题】They will leave for Paris _____ three o’clock in the afternoon and we’ll fly to London _______ a few weeks.
【单选题】—Could you tell me _____? —Certainly. At 8 o’clock. [ ]
A.
when will the train to Beijing leave
B.
when the train to Beijing would leave
C.
when the train to Beijing left
D.
when the train to Beijing will leave
【判断题】If the vertical wind is zero, the vertical speed components relative to the ground and relative to the air are equal.
【单选题】____,we decided to leave at once so that we could catch the train.
B.
Since it being pretty late
【单选题】Air gap is the vertical distance between the bottom of the hull and the ______.
C.
Wave crest plus the charted water depth and tidal corrections
D.
Wave crest plus the charted water depth and tidal correction and storm surge