The inductor voltage phase lags its current by 90 o, and the capacitor current lags its voltage by 90 o, is this conclusion true? [ ]. A: It's impossible. B: When the capacitance and inductance are nonlinear components. C: When inductance current and voltage, capacitance current and voltage are not related direction. D: Whenever.

Which of the following countries lags behind the United States by the largest margin A: France B: Britain C: Germany D: Japan

Today, the development of China's foreign trade is still unbalanced, for example, _____________ lags behind other regions in the scale and level of foreign trade. A: central China B: western China C: eastern China D: southern China