单项选择题
In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).A、For competition. B、For fun. C、For transportation. D、For exercise.
不定项选择 Recruitment at schools and universities is most appropriate when the vacant positions are high level like senior management positions.
单项选择题 设级数的收敛半径是1，则级数在点
单项选择题 自动加速过程产生的原因是：（）。
