下列加线的字读音有误的一项是( )
A:胆怯(qiè)怒吼(hǒu)
B:蜿蜒(wān)飞翔(xiáng)
C:火焰(yán)呻吟(yīn)
D:悬崖(yá)深渊(yuān)
实验开始先通入一氧化碳、排出装置内的空气后,再点燃酒精喷灯加热玻璃管中的氧化铁,先通入一氧化碳后加热的原因是____,实验过程中,观察到试管内的澄清石灰水变浑浊,说明生成了____,试管内反应的化学方程式为____.玻璃管内的现象是____,装置的最末端用燃着的酒精灯的目的是____,请写出一氧化碳与氧化铁反应的化学方程式____.
下列说法正确的是( )
根据所给提示,完成句子。每空一词,含缩略词。There was a football match on TV last night.(变为一般疑问句)____ a football match on TV last night ?He’s been in China since ten years ago.(变为否定句)He ____ in China since ten years ago.Tom got up early in order to catch the first bus to Chongqing.(同义句)Tom got up early ____ he could catch the first bus to Chongqing.Steve will finish his book in a month. (对划线部分提问)____ will Steve finish his book?____ 邮件英语是一种为了节约时间而正在被使用的书面语。(完成句子)E-mail English is a kind of _______ English which is being used to ______ time.
下列物质属于电解质的是( )