题目

下列的各种元素符号中，书写正确的是（） A . CU B . al C . Ca D . AG 答案：C听下面一段材料,回答第1至3题。1. When does the conversation probably take place?A. Early in the morning.        B. Around noon.         C. In the afternoon.2. How far away is the hotel?A. Three km.       B. Five km.       C. Ten km.3. Why does the man need to be quick?A. He wants to get to the destination in time.B. He is unwilling to drive in the dark.C. He hopes to avoid the rush hour.