試題詳解

Which words are missing in the text below?
(A) 1 = climate change and 2 = is not broken down
(B) 1= wave pattern and 2 = accumulates
(C) 1 = rotation of the earth and 2 = accumulates
(D) 1 = distance to the equator and 2 = is not broken down The oceans are dynamic systems, made up of complex networks of currents that keep water circulating around the World. The direction of the currents is determined by wind, variations in water density and ........................(1). Sometimes this creates ocean currents that take on enormous circular motion. These are called gyres. Due to the deflection of ocean currents at the centre of the gyre, plastic debris ................................... (2).