Neap tides occur only(). A.at a new or ful
问题:
Neap tides occur only().
A.at a new or full Moon
B.when the Sun,Moon,and Earth are in line
C.at approximately 28-day intervals
D.when the Moon is at quadrature
Neap tides occur only().
A.at a new or full Moon
B.when the Sun,Moon,and Earth are in line
C.at approximately 28-day intervals
D.when the Moon is at quadrature