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【判断题】
包装上注重安全，在包装上与其它普通商品没有差别，且具有发货封签和个人签名，防止中途有人拆开。该类包装是针对贵重物品的。A.
正确
B.
错误
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【单选题】A centrifugal pump is used in the plateau, the external atmospheric pressure is P0 = 8.6 mH 2 O (absolute pressure), and water at 15 °C is transported. The water vapor pressure is P V = 1.707kPa. Chec...
A.
2.63
B.
6.63
C.
8.23
D.
10.63
【简答题】a. The temperature of an ideal gas with constant heat capacity is changed from T1 to T2. Show that ΔS of the gas is greater if the change in state occurs at constant pressure than if at constant volu...
【简答题】u06p21.mp3: 2. Which of the following protection measures is mentioned in the conversation? A. All the boxes are wrapped up with plastic sheets to be waterproof. B. The boxes are reinforced with steel...
【简答题】热继电器本身在使用中常见的故障有[填空(1)] 、[填空(2)] 和[填空(3)] 。
【单选题】Louisa decided to try scuba diving under pressure from Will. (from P.418-423)
A.
true
B.
false
C.
not given
【简答题】热继电器本身在使用中常见的故障有____ 、____和____ 。
【简答题】热继电器本身在使用中常见的故障有( )、( )和( )等。
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