水利工程水平位移监测通常采用（）。
A.交会法
B.三角高程法
C.水准观测法
D.视准线法
参考答案：D
解析：观测方法的选择：一般情况下，滑坡、高边坡稳定监测采用交会法；水平位移监测采用视准线法（活动觇牌法和小角度法）；垂直位移观测，宜采用水准观测法，也可采用满足精度要求的光电测距三角高程法；地基回弹宜采用水准仪与悬挂钢尺相配合的观测方法。故本题应选D。
| 补全对话（其中有一项是多余的）。 | |
| Man: This morning I'm talking with a very generous young man, Tom,the Bike Boy. Tom is the boy who fixes up old bikes and gives them away. Good morning, Tom. Boy: Good morning. Man: 1 Boy: Well, as you just said, I find or buy old bikes that nobody wants. Then I fix up the bikes and give them away to kids who don't have enough money to buy their own bikes. Man: That's fantastic. 2 Boy: I guess I take after my father. 3 Man: Wow! 4 Boy: I guess so. 5 Man: Oh, that's too bad. Boy: Yeah, I need to come up with some ways of getting money or I'll have to stop. | |
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