下列有关金属腐蚀与防护的说法正确的是
| A.纯银器表面在空气中因化学腐蚀渐渐变暗 |
| B.当镀锡铁制品的镀层破损时,镶层仍能对铁制品起保护作用 |
| C.在海轮外壳连接锌块保护外壳不受腐蚀是采用了牺牲阳极的阴极保护法 |
| D.可将地下输油钢管与外加直流电源的正极相连以保护它不受腐蚀 |
Charles was alone at home, with_______ looking after him.
| A.someone | B.anyone | C.not one | D.no one |
It is often ______ that human beings are naturally equipped to speak.
| A.said | B.to say | C.saying | D.being said |
| A.果脯(fǔ)倾轧(yà)供不应求(gōng) |
| B.模型(mó)殷实(yīn)寡廉鲜耻(xiǎn) |
| C.宝藏(zàng)间断(jiàn) 浑身解数(jiě) |
| D.澄清(chéng)包扎(zā)相形见绌(chù) |
| A.间jiàn黑白相间亲密无间居间调停 |
| B.挨āi挨门逐户挨打受骂延挨度日 |
| C.劲jìng疾风劲草强劲有力刚劲正直 |
| D.舍shě舍我其谁不舍昼夜魂不守舍 |
| A.沉疴 坎坷 呵护 苛捐杂税 百舸争流 |
| B.估量 训诂 故旧 沽名钓誉 怙恶不悛 |
| C.偶尔 寓所 遭遇 向隅而泣 藕断丝连 |
| D.洒脱 哂笑 牺牲 风吹日晒 两栖动物 |