下列属于消化器官的一组是（ ）
A．胃、心脏
B．血管和肾脏
C．胃、肠
D．肺、肾脏
答：A：胃属于消化系统，是消化器官；心脏是血液运输的动力器官，属于血液循环系统．故此选项错误．
B：血管的作用是运输血液，属于血液循环系统；肾脏的作用是产生尿液，属于泌尿系统．故此选项错误．
C：胃、肠都属于消化道的一部分，而且都由不同的组织构成，能完成某些特定的功能，属于器官．故此选项正确．
D：肺是气体交换的重要场所，属于呼吸器官；肾脏的作用是产生尿液，属于泌尿系统．故此选项错误．
故选C
完形填空 The Smiths are taking a vacation next week. At first, they thought about 1 to Beijing. Because they went there three times, so there’s nothing 2 for them. This time, they want to go 3 . 4 are they going then? “I want to go to Jiuzhaigou,” said Tom. “But it’s quite 5 from here and we have only two 6 ,” Mary disagreed. “I think we should go somewhere near here.” And 7 they decided 8 to Qingdao. Qingdao is famous 9 its beautiful beaches. They are leaving 10 Friday evening and staying there 11 two days. On the first day, they are going to the 12 to see the dolphins(海豚). On the second day, they are going to the beach and 13 there. They are taking 14 on the beautiful beach. They are sure that they will 15 themselves in Qingdao.
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