ECG-9620系列心电图机由（ ）、（ ）、控制电路部分三部分组成。
查看答案
ECG-9620心电图机改变了以往对模拟信号的光电耦合，而通过对数字信号进行光电耦合确保了输出信号的线性要求。
A. 对
B. 错
ECG-9620心电图机采用交直流两用电源，使用过程中遵循蓄电池优先的原则。
A. 对
B. 错
____ tries the most serious offenses such as murder and robbery.
A. Magistrates’ courts
B. Youth courts
C. District courts
D. The Crown Court
Which of the following is NOT a characteristic of British government?
A. It offers the Queen high political status and supreme power.
B. It is both a parliamentary democracy and a constitutional monarchy.
C. It has no written form of Constitution.
D. It is the oldest representative democracy
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