>>>更多請點擊：2017年5月13日雅思考試預(yù)測匯總
    2017年5月13日雅思聽力機經(jīng)預(yù)測：Section 4試題預(yù)測
    介紹一個新的水處理系統(tǒng) sea water purify (SW40)
    31-40 Completion
    31. High level of salts makes bore water unsafe to drink.
    32. SW40 makes the bore water clean it can be used in hospitals
    33. SW40 can work effectively but sometimes it is quite slow
    34. They want to get money from an agency called Health International
    35. SW40 can provide a maximum output of 9 liters on a sunny day.
    36. Each SW40 can support the water use of a family
    37.蓋子 is made of glass
    38. SW40 和水平面的夾角是 12.5°
    39 UV radiation 紫外線 can destroy germs
    40. 一個管子滴水到一個圓心的桶里,這個桶叫什么? water collection tank