问题
单项选择题
图示为可变电压放大器，当输入为
时，调节范围为：（）。
A．-5.5～5.5V
B．-1～+1V
C．-0.5～-1V
D．-0.5～+0.5V
答案
参考答案：C
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图示为可变电压放大器，当输入为时，调节范围为：（）。
A．-5.5～5.5V
B．-1～+1V
C．-0.5～-1V
D．-0.5～+0.5V
参考答案：C
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| Tom is six now. His mother 1 in a watch factory. She is busy all day, she has to 2 at six in the morning. Then she cooks 3 for her family. She goes to work with some 4 so she can have lunch in the factory. At six in the afternoon, she comes back and cooks supper 5 . After she does the housework, she often 6 she's tired. So she wants to have a good holiday. "What do you want a holiday for, Mummy?" "I want to have a good rest," says the woman. "I can take you to the zoo to see the 7 " Tom likes the monkeys very much and 8 wants to see the elephants. September is coming and a new school 9 begins. His mother asks, "Would you like to go to school, my dear?" "I'd love to," says the boy, " 10 I am going to have a holiday, too!" | ||||
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