增大交流变送器的输入电流，则输出直流也相应的按比例（）。
A.减小
B.增大
C.不变
参考答案：B
The president spoke at the business meeting for nearly an hour without _________ his notes.
A．bringing up
B．referring to
C．reacting to
D．trying on
烧死的尸体外部征象有哪些？
