海滨____(bīn bīng) 胳臂____(bì bei) 理睬____(cǎi chǎi)
栽____(zāi zhāi)树 喧____(xiān xuān)闹 除____(cú chú)了
— Are there any flowers _______ the tree.— No. But there are many birds _________ it.
下列各组离子在强酸性无色透明溶液中能大量共存的是
小强在做“伏安法测电阻”实验中,连接的电路如图甲所示.