Part One Q1-12 You will hear three telephone conversations or messages. Write one
Part One Q1-12 You will hear three telephone conversations or messages. Write one or two words or a number in the numbered spaces on the notes or forms below. After you have listened once, replay each recording. 音軌 2-02 到 2-03 Conversation One Q1-4 Look at the note below. You will hear a man calling a colleague about making changes to his schedule. JACKSON’S ASSOCIATES Telephone Message Caller: James Horrocks Date and time of call: 6 th April 9.45 am Message RESCHEDULE MORING: The meeting with John Row() __________________________ to Freda Bell.
答案:(a) 不振。同名端接反,不滿足正反饋; (b) 能振。變壓器耦合反饋振蕩器; (c) 不振。不滿足三點(diǎn)式振蕩電路的組成法則; (d) 能振。但 L 2 C 2 回路呈感性, w osc < w 2 , l 1 c 1 回路呈容性, w osc > w 1 ,組成電感三點(diǎn)式振蕩電路。 (e) 能振。計(jì)入結(jié)電容 C b ¢ e ,組成電容三點(diǎn)式振蕩電路。