下列哪项不是玻璃内层的通常施工方法（） A: 喷雾 B: slush C: hotdusting D: 静电喷涂

We've got ______ which is used in countries where it is difficult to do business without offering bribes.( ) A: a slush fund B: a bribe C: industrial espionage D: a confidentiality agreement

According to the passage, what is believed to cause the thin<br/>lines seen on Europa’s surface? ___ A: A long period of extremely high tides B: Water breaking through from beneath the surface ice C: The continuous pressure of slush on top of the ice D: Heat generated by the hot rocky core