选择题:What.s the purpose of writing a letter of invitati 题目分类:管理英语1 题目类型:选择题 查看权限:VIP 题目内容: What.s the purpose of writing a letter of invitation?选择一项:a. To inform people what is happening.b. To tell the receivers the details of the coming events.c. To invite people for a business event or personal parties. 参考答案:
多级放大电路与单级放大电路相比,总的通频带一定比他的任何一级都_________。 多级放大电路与单级放大电路相比,总的通频带一定比他的任何一级都_________。 A.共射 B.共集 C.共基 D.不确定 分类:管理英语1 题型:选择题 查看答案