Aistandard surface材质中，主要用来增强玉石、纸张等半透明效果的属性是？ A: subsurface B: base C: specular D: coat

According to the passage, what is the effect of Jupiter's other large moons on Europa（） A: They prevent Europa's subsurface waters from freezing B: They prevent tides that could damage Europa's surface C: They produce the very hard layer of ice that characterizes Europa D: They assure that the gravitational pull on Europa is maintained ar a steady level