SXB型数字温度巡测仪表的电路主要由采样器、______、______及控制器四大部分以及分组电路、自检电路、电源电路等部分组成。
参考答案:模数转换器;报警器
He did not regret saying what he did but felt that he ______ it differently. [ ]
A. could express
B. would express
C. could have expressed
D. must have expressed
位于莫霍界面和古登堡界面之间的地球内部圈层是()
A.地壳
B.岩石圈
C.地幔
D.地核