The astronauts on board the spaceship______ in shape by running around the ceiling of a hu

Among the main propulsion units on board the ship with the same capacity, the lightest one is_____.

Was it in 1969 ______ the American astronaut succeeded ______ landing on the moon？A．when;

The urgency signal concerning the illness of persons on board ship is （).A.MAYDAYB.PANC.SE

The chairman of the board imposed on me the unpleasant job of dismissing good workers the

－ （)－ Today’s rate is listed on the board here.

There were eighteen people on board the Matthew d