【单选题】听力原文: What is cloning? Cloning is the creation of cells or whole animals using DNA from a single 'parent', bypassing the normal reproductive process. The clone has the same DNA as the parent. The most...
【简答题】For centuries, people have been pushing the limits of what they can do. But it seems that these days the limits are getting higher and higher. Normal waves are big enough for experienced surfers. They...
【单选题】A 3-day-old boy at 37 weeks' gestational age is brought to the emergency room by his mother after the baby presented with jaundice. The mother describes her baby had jaundice on the first day after bi...