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Ted: Hi, Christine. ______？ Christine: Hi, Ted. I just bought a new camping tent. I can't
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宜于餐后服用的药品是E．
对以腹泻为主要症状的肠易激综合征者宜选用E．
Of course, scientists can't answer all of your questions. If we ask, "Why is the ocean full of salty" scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into the cracks. The rain then carries the salt into he earth and into the rivers. The rivers carry the salt into the ocean. But then we ask, "What happens to the salt in the ocean？ The ocean doesn't get more slat every year". Scientists are not sure about the answer to this question.
We know a lot about our world. But there are still many answers that we do not have, and we are curious.
The main idea of this passage is ______.
Wang: I've got an appointment. I'm going to meet a friend in London at 3 p.m. It's already
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