SSB接收机AGC电路的时间常数应满足（）
A、快充，快放，快恢复
B、慢充，慢放，慢恢复
C、快充，慢放，快恢复
D、快充，快放，慢恢复
参考答案：C
根据要求变换句型。
1. Can you drive? (作肯定回答)
________, I can.
2. It's a hand. (变为复数)
They are ________.
3. There're ten chairs. (对划线部分提问)
________ many chairs ale there?
4. Tony has got a big family. (变为否定句)
Tony ________ got a big family.
5. The Pleasant Goat (喜羊羊) is from China. (对划线部分提问)
________ is the Pleasant Goat from?
血管外破坏红细胞的主要场所是()
A．肝脏
B．脾脏
C．肺
D．淋巴结
E．胸腺和骨髓
