单项选择题
A.published with B.combined with C.in connection with D.subject to
My position has been obtained （） astronomical observati...
单项选择题My position has been obtained （） astronomical observation．
A.with B.from C.on D.by
Magnetic information on a chart may be （）.A.found in th...
单项选择题Magnetic information on a chart may be （）.
A.found in the center(s) of the compass rose(s) B.indicated by isogonic lines C.found in a note on the chart D.All of the above
Entering from sea，a daymark on the port side of the cha...
单项选择题Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a （）.
A.red triangle with the letter R B.white triangle with the letters RG C.green square with the letter G D.white square with the letters GR
