问题
单项选择题
克服无线电静区的一般方法什么（）
A、增大发射功率
B、增大发射频率
C、降低发射功率
D、降低发射频率
答案
参考答案：D
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克服无线电静区的一般方法什么（）
A、增大发射功率
B、增大发射频率
C、降低发射功率
D、降低发射频率
参考答案：D
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| Hello! I’m Jim, I come__1__England. I__2__short, yellow hair and blue eyes. Now I’m a student of Beijing. In the morning, I __3__ at six. __4__I take a walk (散步) with my dad. At about seven, I have breakfast. Porridge __5__ my favourite. After breakfast, I go to school.I have __6__ at school. The food is very good. I have __7__ foods for lunch. Sometimes (有时) I have __8__ , meat and noodles; sometimes I have dumplings. __9__the evening, I have supper at home. I do__10__ homework before I go to bed. | |||
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