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Old car tyres Car tyres are a big problem for the environment because they are non-degradable. If you just store them under the ground, they can give off toxins and chemicals into the earth around them. The good news is that rubber tyres can be reused in many different ways: ● You can use them for the sides of boats to stop them from crashing into the harbour walls; ● You can use them for children's play equipment; ● You can make old tyres into computer mouse mats, pencil cases, and notebook covers; ● You can reuse them as carpet mats and tiles .Several carpet manufacturers use recycled tyres as a major part of their carpets. To reduce your tyre waste, look after your tyres: ● Buy good quality tyres that have a long life; ● Don't drive on tyres that are too hard or too soft; ● Change the position of your tyres from the front of the car to the back of the car every 6,000 miles. When it's time to replace your tyres, either take your vehicle to a vehicle service shop that recycles tyres(they may charge a small fee for the recycling part of the service)or, if you replace the tyres yourself, find out where you can take your old tyres for recycling. In some areas, tyre shops will take them back for a small fee. Choose the correct endings.
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【判断题】动车维修分为五个等级,一级和二级检修为定期检修,三、四、五级检修为运用检修
A.
正确
B.
错误
【单选题】如下哪一项是太阳与地球上某一区域之间辐射传热速率最重要的影响因素()
A.
热辐射线的投射角
B.
两者之间介质的性质(如地球大气层中温室气体的含量)
C.
两者之间的距离
D.
该区域表面的状况
【简答题】影响辐射传热的主要因素有哪些?
【单选题】下列器官中能够产生性激素的内生殖器是
A.
阴蒂
B.
阴道
C.
卵巢
D.
子宫
E.
输卵管
【单选题】下列关于影响矿物的辐射传热的因素表达正确的是?
A.
样品颗粒大小不会影响
B.
样品铁含量 不会有影响
C.
样品中氢缺陷会有影响
D.
样品中氢缺陷不会有影响
【多选题】动车组实行以走形公里为主的定期检修,检修分为五个等级,其中一级和二级为 [填空(1)] ,三级、四级和五级为 [填空(2)] 。
A.
运用维修
B.
定期检修
【单选题】辐射传热的主要影响因素是 ( )
A.
温度
B.
温度差
C.
传热面积
D.
传热系数
【单选题】影响辐射传热的主要因素是()。
A.
黑度
B.
辐射系数
C.
绝对温度
D.
摄氏温度
【简答题】称取 NaCl试样0.1248g,以K 2 Cr O 4 为指示剂,用 0.1050 mol /L AgN O 3 滴定至终点,用去 20.08ml,计算NaCl的质量分数 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】颐和园中的局部对称线一共有()条。
A.
1
B.
2
C.
3
D.
4
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