题目10单选题
图4.4所示电路中,<img src="https://tihai-oss-cloud.itihey.com/img/e8c12bb4bbc8a452bf52eb97feb9e20b.webp">,<img src="https://tihai-oss-cloud.itihey.com/img/3409f0a5f3358400520bbaca96418ac8.webp">和<img src="https://tihai-oss-cloud.itihey.com/img/417f5f2eba1b49c5face3209d1a1993b.webp">单独作用时,<img src="https://tihai-oss-cloud.itihey.com/img/1dfbc399b1cc8ef7e89870f547d0b5d4.webp">和<img src="https://tihai-oss-cloud.itihey.com/img/5a55f47af9e0730de4898b8f2fafc723.webp">等于( ).<img src="https://tihai-oss-cloud.itihey.com/img/23e2c188ad042d9b813e995b537d2c54.jpg">A. 2V、1V,2V、1VB. 2V、1V,-1V、2VC. -1V、2V,2V、-1VD. 2V、1V,1V、2V