已知f(x)=2x-1,且f(a)=3,则a=______.
∵f(x)=2x-1,且f(a)=3,
∴2a-1=3,解得a=2.
故答案是:2.
句型转换。
1. Let's have dinner. (改为否定句)
Let's_____ ______dinner.
2. What can I do for you?(同义句)
Can I ______ ______?
3. Those are rulers. (改为单数形式)
______ is a ______.
4. His brother has a computer. (改为一般疑问句)
________his brother a computer?
5. Your ID card is on the dresser. (对划线部分提问)
______ is ______ ID card?
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