The geoid surface is treated as the surface of mean sea level, which is important for measuring elevations or heights. （ ）
举一反三
- Would you like to get up early tomorrow______.(） A: seeing the sun rising above the surface of the sea B: to see the sun rise above the surface of the sea C: see the sun rise above the surface of the sea D: to see the sun rising above the surface
- Where is the measuring position of the uneven gauge in our country？ A: 10mm below the rail top surface B: 12mm below the rail top surface C: 14mm below the rail top surface D: 16mm below the rail top surface
- Which method is used to detect rot in manila lines?（） A: Feeling the surface of the line for broken fibers B: Measuring the reduction in circumference of the line C: Observing for the appearance of mildew on the outer surface D: Opening the strands and examining the inner fiber
- The principles for machining sequence of each surface should be( )<br/>and perform rough machining before finish machining. A: perform datum surface machining before that of other surfaces B: perform main functional surface machining before less important surface machining C: perform plane surface machining before hole surface machining D: perform complex surface machining before simple surface machining
- Fiction has two levels of understanding, the narrative level and the<br/>authorial level, or the <br/>surface<br/>level and the deep level of understanding.()