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控制测量可以分为高程控制和平面控制。（）
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you will hear a monologue. While you listen, fill out the blank with a phrase or sentence you've just heard. Some of the information has been given to you in the text. You will hear the recording twice. You now have 25 seconds to read the text below. He is big. He always has been, over six feet, with what slump of the shoulders and tuck in the neck big men in this country often affect, (1) to apologize for being above the democratic norm (2).(In high school and at college he played varsity basketball. In high school he was senior class president.) And he looks healthy enough, blue-eyed behind his beard, like a trapper or (3),acquainted with silences. He also grins a lot. Odd, then, to have noticed earlier—at the house, when he took off his shabby coat to play Ping-Pong—that the white arms were very thin. The coat may have been a comment. This,(4), is southern California, where every man is an artist, an advertiser of himself;(5)and every object potted; where even the statues seem to wear socks. The entire population ambies, in polyesters, toward a Taco Bell. To wear a brown shabby cloth coat in southern California is to admit something. So he hash't been getting much exercise. (6) have elected him president of any class. At the house they avoided him. Or, since he was too big to be avoided entirely, they treated his presence as a kind of odor to pass through hurriedly, to be safe on the other side. They behaved like cats. Of course, he ignored them. (7) they were up to more than just protecting themselves from (8) . Children are expert readers of grins. His grin is intermittent. The dimples twitch on and off; between the teeth are bared; above them, the blue eyes disappear in a wince. This grin isn't connected to any humor (9) . It may be a tic. It could also be a function of some metronome made on Mars. It registers (10) . We aren't listening to the same music. 9（）
If those "mad moments"--when you can’t remember what your friend has told you or where you left your keys--are becoming more frequent, mental exercises and a healthy brain diet may help. Just as bodies require more maintenance with the passing years, so do brains, which scientists now know show signs of aging as early as the 20s and 30s. "Brain aging starts at a very young age, younger than any of us had imagined and these processes continue gradually over the years," said Dr. Gary Small, the director of the Center on Aging at the University of California, Los Angeles. ’Tin convinced that it is never too early to get started on a mental or brain-fitness program," he added. In his book, The Memory Bible, the 51-year-old neuroscientist (神经学家) lists what he refers to as the 10 suggestions for keeping the brain young. They include training memory, building skills, reducing stress, mental exercises, brain food and a healthy lifestyle. "Misplacing your keys a couple of times don’t mean you should start labeling your cabinets. Memory loss is not an inevitable consequence of aging. Our brains can fight back," he said. Small provides the weapons for a full-scale attack. Simple memory tests give an indication of what you are up against and tools such as "look" and "connect" are designed to make sure that important things such as names and dates are never forgotten. "So if you wanted to learn names and faces, for example, you meet Mrs. Beatty and you notice a distinguishing facial feature, maybe a high eyebrow," said Small. "You associate the first thing that comes to your mind. I think of the actor Warren Beatty, so I create a mental picture of Warren Beatty kissing her brow." Small admits it may sound a bit strange but he says it works. "Mental exercises could be anything from doing crossword puzzles and writing with your left hand if you are right handed or learning a language. It could be anything that is fun that people enjoy doing," he added. By giving the example "you meet Mrs. Beatty and you notice a distinguishing ...eyebrow", Dr. Small is trying to explain the memory tool of ______
三角高程测量的基本思想是根据三角原理，利用由测站向照准点所观测的水平角和它们之间的距离，计算测站点与照准点之间的高差。（）
控制网的精度越高，点位越密，测量的工作量越大，施测工期也就越长。（）
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