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Passage Two Questions 30 to 32 are based on the passage you have just heard.
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If you can provide satisfactory after-sale service, your products will surely have a wide market here.
Passage Three Questions 33 to 35 are based on the passage you have just heard.
安全阀定压Ps为1.52 MPa，天然气泄放量为1.5×104m3/h，温度18℃，选用弹簧全启式安全阀，则天然气定容比热容为( )。 (天然气摩尔成分CH4：96%，C2H6：0.8%，C3H8：0.2%，CO2：2.8 %，N：0.2%)(K取0.7，Z=0.97)
Almost everyone in the world uses oil in some way. Without oil, the world will stop, so men look for it everywhere. They drill for oil in the deserts, in mountains and under the sea. Quite often they find nothing, but the search for oil always goes on. Oil is very important because none of our machines can run without it. Big ships carry oil everywhere. Perhaps the oil in your bicycle or in your father’s car has come from somewhere far away. Perhaps it has come from Iraq (伊拉克) or Venezuela (委内瑞拉). Cars and bicycles need oil, and so do many other things. How many things can you name Men ______ oil all the time.
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