A.Big waves pose a threat to commercial navigation.B.The river current never flows faster ten miles per hour.C.The river reverses its flow several times a day.D.High tides can create sudden and unexpected rapids.
A.Big waves pose a threat to commercial navigation.
B.The river current never flows faster ten miles per hour.
C.The river reverses its flow several times a day.
D.High tides can create sudden and unexpected rapids.