电压表和电流表都是由电流计(?)改装而成,如表1所示。由于(?)表由(?)表串联一个电阻分压,因此,在常规使用的情况下我们一般把(?)表串联在电路中测较大的电流;(?)表由(?)表并联一个电阻分流,在常规使用的情况下我们一般把(?)表并联在电路中测较大的电压。 Voltmeter and ammeter are modified by the ammeter (?), As shown in Table 1. (?) Table by the (?) Table in series with a resistor divider, so in the case of conventional use, we generally (?) Table in series in the circuit to measure a larger current; In parallel with a resistor shunt, in the case of conventional use, we generally (?) Table parallel measured in the circuit to measure large voltage.