题目

下列关于 和 的说法正确的是（） A . 核素中的中子数为8 B . 核素中的电子数为8 C . 核素中的质子数为14 D . 和 互为同位素． 答案：A听下面一段材料，回答第1至2题。1. What do you think is the woman? A. A student. B. A clerk. C. A nurse. 2. Why would she like to find an apartment? A. She needs more time to study. B. She is afraid to go home at night. C. She wants to have some trip.