 Which best describes the relationship between Keech and Houlihan?
Every writer must seek his own Flowery Kingdom in imagination's wide demesne, and if that search can begin and end on Earth his problem has been greatly simplified. A one-time Air Force officer, he has turned to fantasy in his lighter moments, to bring us such brightly sparkling little gems as this. houlihan's equation by ... But its small, mischievous pilots had a rendezvous with destiny—on Earth. It was in a park near the nuclear propulsion center—a cool, green spot, with the leaves all telling each other to hush, be quiet, and the soft breeze stirring them up again. That morning I had been trying to work out an equation to give the coefficient of discharge for the matter in combustion. You may call it gas, if you wish, for we treated it like gas at the center for convenience—as it came from the rocket tubes in our engine. Without this coefficient to give us control, we would have lacked a workable equation when we set about putting the first moon rocket around those extraordinary engines of ours, which were still in the undeveloped blueprint stage. When you start from scratch, matter discharged from any orifice has a velocity directly proportional to the square root of the pressure-head driving it. At the terrible discharge speed of nuclear explosion—which is what the drive amounts to despite the fact that it is simply water in which nuclear salts have been previously dissolved—this small factor makes quite a difference. I had to figure everything into it—diameter of the nozzle, sharpness of the edge, the velocity of approach to the point of discharge, atomic weight and structure— Oh, there is so much of this that if you're not a nuclear engineer yourself it's certain to weary you. Perhaps you had better take my word for it that without this equation—correctly stated, mind you—mankind would be well advised not to make a first trip to the moon. And all this talk of coefficients and equations sits strangely, you might say, upon the tongue of a man named Kevin Francis Houlihan. Not children, but a group of little people, hard at work. I had seen them first as a boy of eight, and then, very briefly again, on my tenth birthday. Or so the legends affirmed, though I've wondered often about the truth of them. You see, in a place as full of science as the nuclear propulsion center there is not much time for the old things. There were a pair of triangular fins down at the bottom, and stubby wings amidships.
 They have a tenuously constructed relationship based on trust necessitated by the situation
 Keech doesn't prefer interacting with scientists but he knows he can trust Houlihan  Houlihan is resentful for being taken away from time in his own lab but feels indebted to Keech  They have a tenuously constructed relationship based on trust necessitated by the situation  There is a lot of mutual trust and respect between scientists