若要研究通过导体的电流与导体两端电压的关系,除了图示器材外还需要:电源(恒压)、开关、导线、____ ,同时应将小灯泡换成定值电阻,理由是____ 。
⑴____A. morning B. good C. afternoon
⑵____A. friend B. sister C. brother
⑶____A. this B. I C. you
⑷____A. is B. am C. be
⑸____A. he B. she C. my
一次函数y=﹣2x﹣1的图象不经过( )
以下哪种消费方式不是“寅吃卯粮”的体现( )
As teenagers, we're old enough ________ with housework. We can help set the table, wash the dishes and clean our own rooms.