更多"D点高程Hn=43.251m，测得后视读数a=1.000m，前视读数b"的相关试题:
[单项选择]D点高程Hm=43.251m，测得后视读数a=1.000m，前视读数b=2.283m。则视线高Hi和待求点N的高程分别为（）。
A. 45.534m，43.251m
B. 44.251m，41.968m
C. 40.968m，38.685m
D. 42.251m，39.968m
[判断题]( )视线高等于前视点的高程加上前视读数。
A.正确
B.错误
[单项选择]平整场地时，水准仪读得后视读数后，在一个方格的四个角M、N、O和P点上读得前视读数分别为1.254m、0.493m、2.021m和0.213m，则方格上最高点和最低点分别是：（）
A. P、O
B. O、P
C. M、N
D. N、M
[判断题]水准测量观测完后视读数，将望远镜照准前视读数时，发现圆水准器气泡已不居中，此时应调节脚螺旋使气泡居中后，再接着进行观测。（）
[单选题]在水准测量过程中临时选定的立尺点，其上既有前视读数，又有后视读数，这些点称为( )。
A.水准点
B.中点
C.转点
D.待定点
[单项选择]水准测量中，A点为后视点，B点为前视点，A点高程为ha，后视读数为a，前视读数为b，则B点高程（）
A. ha-a+b
B. ha+a-b
C. a+b–ha
D. a-b–ha
[填空题]水准测量中转点的特点是既有前视读数又有（）。
[单项选择]水准测量中，仪器视线高应为（）。
A. 后视读数+后视点高程
B. 前视读数+后视点高程
C. 后视读数+前视点高程
D. 前视读数+前视点高程
[单项选择]隔断物的高度在( )m以上、高于一般人的视线高度时，具有强围合感。
A. 1.5
B. 1.6
C. 1.7
D. 1
[单选题] 安全标志牌设置的高度尽量与人眼的视线高度相一致，悬挂式和柱式的环境信息标志牌的下缘距地面的高度不宜小于（ ）m。
A.1.8
B.2
C.2.2
D.2.5
[单选题]安全标志牌设置的高度，应尽量与人眼的视线高度相一致。悬挂式和柱式的环境信息标志牌的下缘距地面的高度不宜小于（ ）
A.0.5m
B.2m
C.1.5m
D.1m
[判断题]( )视线高等于后视点的高程加上后视读数。
A.正确
B.错误
[单项选择]Roger: Hi, Frank.
Frank: Hi, Roger. The party is really nice, isn't it
Roger: ______. Lots of food and drinks!
A. It is real
B. It sure is
C. It is certain
D. It must be
[单项选择]Roger: Hi, Frank.
Frank: Hi, Roger. The party is really nice, isn't it
Roger: ______. Lots of food and drinks !
A. It is real
B. It sure is
C. It is certain
D. It must be
[单项选择]
W: Hi, John.
M: Oh! Hi, Laura. What are you doing here
W: Oh, I’m usually here on weekends. It’s my dad’s shop. So are you looking for a bike
M: Yeah. Now that the weather is warming up, I thought I’ll get some exercise instead of taking the bus all the time.
W: Well, you’ve come to the right place. Do you know what you would like
M: Well, I don’t want a racer or a touring bike or anything. Mostly I’ll just be using it to get me back and forth from work.
W: How far is that
M: About four miles.
W: Are there a lot of hills on the way
M: Some I guess. But maybe I should tell you up front that I’ve only got 150 dollars. Can I get anything decent for that
W: Well, you are not going to get anything top of the line. But we do have a few ones in the back that are in good condition.
M: That sounds good.
W: You are right. For the kind of ride you a
A. To replace his stolen bicycle.
B. To begin bicycling to work.
C. To join a bicycle club.
D. To train for a bicycle rac
