题目

从方框中选择句子补全对话，其中有两项是多余的。 A: Hi, Zhou Qiang. Haven’t seen you for too long!   1  B: I’ve just been to the Three Gorges (三峡). A: Really?   2  B: Right. As you know, we’ve built a great dam (坝) across the Changjiang River. A:   3  B: Yes, the dam is stopping water these days. And the water is rising 2 meters every day until it is 135 meters high. A: Oh, no wonder it’s said the beautiful scenery (风景) of Kuimen will be under water. What a pity! B:   4   It has been copied in another place with some other places of int给兔注射C6H121806，在兔体内最先发现含有180的物质是下列的哪一种（ ）A. 丙酮酸B. H20C. C02D. 乳酸