一理想变压器原、副线圈匝数比,原线圈与正弦交变电源连接,输入电压u随时间t的变化规律如图所示,副线圈仅接入一个10Ω的电阻,则 ( )
_______ don’t you let your parents know you need them?
________ watching a movie in an IMAX cinema costs over 100 yuan, the IMAX cinemas are always full of audience.
My little cousin is a (an) boy and he always asks me all kinds of strange questions.
— It seems that Jimmy is feeling bad about the exam.— He needs to _______.A “C” is not the end of the world.
Daniel does not know he should talk to.