题目内容

A．known forB．named afterC．definedD．called

A. known for
B. named after
C. defined
D. called

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某高程测量见下图，已知A点高程为HA，欲测得B点高程HB，安置水准仪于A、B之间，后视读数为a，前视数为b，则B点高程HB为()。

A. HB=HA-a-b
B. HB=HA+a+b
C. HB=HA+a-b
D. HB=HA-a+b

A．whatB．/C．whereD．which

A. what
B. /
C. where
D. which

A．convenientB．comfortableC．availableD．helpful

A. convenient
B. comfortable
C. available
D. helpful

A．To takeB．TakenC．TakingD．Being taken

A. To take
B. Taken
C. Taking
D. Being taken