D.BCC Customer Service Centres
2.We can learn from the passage that ________.
A.buses are scheduled as usual on weekends and public holidays
B.regular students at QUT need to buy adult tickets
C.prepaid tickets can be bought from the Public Transport Information Centre
D.Tentrip Savers can be used at offpeak time
3.An exchange student staying at QUT for five days has to travel between zones every day.What type of ticket would he probably buy?
A.Single.B.Weekly.
C.Offpeak Daily.
D.Tentrip Saver.
B
Have you ever noticed the colour of the water in a river or stream after a heavy rainfall? What do you think caused this change in colour?It is soil that has been washed into the river from the riverbank or from the nearby fields.
Components of Soil
Soil is made up of a number of layers(层),each having its own distinctive colour and texture.The upper layer is known as the litter.It acts like a blanket,limiting temperature changes and reducing water loss.The topsoil layer is made up of small particles of rock mixed with rotten plant and animal matter called humus(腐殖质),which is black and gives the topsoil its dark colour.This layer is usually rich in nutrients,oxygen,and water.Below the topsoil is the subsoil,a layer that contains more stones mixed with only small amounts of organic matter.This layer is lighter in colour because of the lack of humus.Beneath the soil lies a layer of bedrock.
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