数字探伤仪超声信号经接收部分放大后,由模数转换器将模拟信号变为数字信号传给电。
参考答案:对
--- What is the weather like tomorrow?
--- The weather forecast says a big snowstorm is .
A.hoped
B.supposed
C.expected
D.announce
什么是基于裸机的软件设计?其设计步骤分为那几步?