4V的酸性矿灯灯泡的光效为（）m/W。
A、120
B、121
C、125
D、150
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实在点不开答案，可以分享到微信，
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APP具体操作流程为：
口腔检查的特殊检查为（）。
A.视诊
B.叩诊
C.扪诊
D.温度刺激
E.问诊
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| You Are Going Places One day I came home from school, changed my clothes and got ready for work. I work at a local restaurant in town as a cashier, seater and waiter. I went to work feeling 1 . And to make matters worse, I was busy that evening. It' s the same thing over and over again. 2 with customers who complain about their food and where they are 3 is too big or too small. Little things like that tend to 4 a lot of us 5 but we manage to deal with it. Three elderly ladies walked in and sat by the windows. It happened to be the very 6 near where I keep the dirty 7 in the boxes. Trying to keep up with all the dirty tables, customers leaving and coming in and 8 running all over the house, it was crazy. 9 these elderly women were watching 10 I was working to make sure every table was clean and ready for the next customers. When they 11 their meals, I took their plates back to the kitchen. They talked to me for a while about school, how I was doing, what 12 I was in and what I planned to do in the future. 13 they were leaving, they walked past me and one of them said to me in a 14 and gentle voice, "You are going places. And that was it. They left the 15 and I had tears in my eyes, because they gave me 16 to believe in myself. They 17 my spirit from being down and gave me a 18 to keep on working hard. People used to tell me that I couldn't have a career in 19 until I had a degree. I'm now a co-anchor (联合主 持人) of a student-produced television 20 . And the best thing is: I'm only 17 years old and I am a senior in high school. | ||||
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地理播种法
绝缘导线连接有哪些基本要求。（）
A.连接可靠，其接头电阻值不应大于相同长度导线的电阻值
B.机械强度高，其接头的机械强度不低于导线机械强度的80％
C.耐腐蚀，接头应耐化学腐蚀和电化学腐蚀
D.绝缘性能好，其接头的绝缘强度应不低于导线的绝缘强度
高斯投影属于那种投影？