滞回比较器具有两个门限电压,因此当输入电压从小到大逐渐增大经过两个门限电压时,会发生两次跳变。
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Task 2 Listen to the conversation and fill in the blanks with what you hear. M: Hi Diana, thanks for your help on the contract. We’re having a dinner this evening to celebrate getting the contract. .W: I have to work overtime tonight.M: That’s a pity! Maybe you could join us a little later?W: I’m really sorry. . I’m going on a business trip tomorrow and have got an early plane to catch.M: Sorry you can’t be there. ?W: Sure. Anyway, . Hope you guyshave fun!
英国的最后一个专制王朝是?
A. 都铎王朝
B. 斯图亚特王朝
C. 温莎王朝
D. 金雀花王朝
在近代欧洲被送上断头台的君主包括?
A. 查理一世
B. 詹姆斯一世
C. 路易十四
D. 路易十六
“人文主义”一词起源于谁?
A. 普罗泰戈拉
B. 柏拉图
C. 西塞罗
D. 马基雅维利