题干

“苛性钠、烧碱、纯碱、火碱”四种俗称中所代表的物质只有(   )

A:1种  

B:2种  

C:3种  

D:4种

上一题 下一题 0.0难度 选择题 更新时间:2019-05-15 08:03:08

答案(点此获取答案解析)

B

同类题3

阅读下文,回答问题

回家

徐风

    ①已近年关,隐藏在大山褶皱里的小县城年味渐浓。火车的汽笛声频繁地响起。一条悠长的巷道里藏着几户人家。一座陈旧的小四合院里传来清脆的电话铃声。

    ②妈,再过一两个小时我们就到家了,晚饭回家吃,一年没吃到您做的饭了,呵呵。

    ③你这孩子,咋突然就改主意了?不早讲,也好让妈提前高兴着,刚才还和苗苗念叨呢,苗苗一直想去看你们呢。

    ④不是想给您个惊喜吗,呵呵。

    ⑤好好好,妈这就准备去。苗苗奶奶放下电话,苗苗,你都听到了吧,你爸妈一会就到家喽,自己好好玩,奶奶给你做好吃的。奶奶脸上的皱纹一下全舒展开了。

    ⑥五岁的苗苗听说爸妈要回家了,高兴得手舞足蹈,冲向大门口。奶奶扶起被门槛绊倒的孙子,轻拍了下孙子的小脑瓜,乐呵呵跑进了厨房。

    ⑦就是,有钱没钱也得回家过年嘛。你们不记挂妈,不记挂苗苗,俺祖孙俩可天天伸脖子盼呢。苗苗奶奶一边自言自语,一边恨不得手脚并用地忙活。一切准备就绪,额头上竟沁出了一层细密的汗珠。瞅着还算丰盛的菜肴,关键都是儿子媳妇爱吃的,喜滋滋地擦了擦汗,又捶了几下腰,却并不急着点火。天寒地冻的,等着儿子媳妇回家边炒边吃。也就在此时她才忽然想起小孙子,好像老一会没听到动静了,心里不知咋的“咯噔”一下,边喊边出了厨房,无人应答。

    ⑧苗苗奶奶翻遍了满屋满院,犄角旮旯,仍不见小孙子人影,便心慌慌地跑出院子,挨家挨户寻找。邻居们都是一样的答案,她大声呼喊着追出巷子,来到街上,四下里飞速扫了一遍,眼里满是失望和惊恐。

    ⑨这个节骨眼上孙子要是出点啥事,这个年还咋过?我咋向他爸妈交代?老天爷啊!苗苗奶奶双腿如灌了铅,“扑通”瘫坐在地上。

    ⑩天色渐晚,还飘起了雪花

    ⑪咱这儿就巴掌大的地方,何况还报了警,他们很快就能把苗苗找到的。

    ⑫邻居们正在不住地安慰着精神几乎失控的苗苗奶奶,一阵急促的铃声骤然响起。

    ⑬真悬哪!苗苗奶奶哆嗦着手听完电话,扯着电话线瘫倒在地。

    ⑭邻居们急忙把苗苗奶奶搀起来,问:咋了?到底说啥了?

    ⑮孩子在车站警务室呢!苗苗奶奶带着哭腔说。

    ⑯咱咋就没想到呢?车站离这里不是很远。

    ⑰敢情这孩子是去接站了,等不及了。

    ⑱哎哟喂,你说这么点小孩,幸亏被警察发现了。

    ⑲麻烦你们帮我再守会家,我去把孩子弄回来。苗苗奶奶边说边往外走。

    ⑳让老刘守着,我们几个陪你一块去吧,天黑路滑的。几个热心的邻居前后撵了上去。

    ㉑工夫不大,一行人来到警务室。还未进门,苗苗奶奶就发现小孙子坐在沙发上伸着长长的舌头,正“吧唧吧唧”地舔着棒棒糖。

    ㉒苗苗奶奶气不打一处来,紧走几步,推门闯了进去,也忘了跟警察道谢,一把将苗苗从沙发上拖下来,抬手屁股上就一巴掌:你个小冤家,差点把奶奶吓死!

    ㉓奶奶不讲理,我又没做错事。反应过来的苗苗咧着嘴委屈地辩解。

    ㉔还没错呢?奶奶又举起巴掌。

    ㉕孩子毕竟小嘛,没丢就万幸了。邻居劝住苗苗奶奶。

    ㉖警察抱起苗苗,笑说:大娘,消消气,您往别处想想看,孩子今天这个举动是不是挺招人疼?他跟我们讲他爸爸电话里说给您一个惊喜,他也要给他爸妈一个惊喜呢。多乖,多懂事。

    ㉗苗苗奶奶瞅着警察怀里噘着嘴巴、抽抽噎噎的小孙子,忍不住老泪直流。

    ㉘此时,“呜——呜——”似是火车进站的汽笛响起,雪花也越发欢快起来

(选自《羊城晚报》,有改动)

同类题4

任务型阅读       

     Becoming Refreshed without sleeping

     Sometimes there is just not enough hours in the day to get everything done and get a good night’s rest.____ Once in a while you can get away with a sleepless night and still feel reasonably good by adjusting your meals and activities.

     ____ The last thing you want to do when you are tired is get warm and cozy, this will cause you to fall asleep. Keeping the air conditioner on will make you feel much more alert and refreshed.

     Eat small amounts. Eating small amounts of healthy food will help refresh you. Fruit and nuts are a good choice because they are nutritious and will energize you ____Try to stick to low carbon meals to keep you going. Chewing gum after your snack or small meal will also help keep you awake.

     Keep it bright. When it is dark your body thinks it is time to go to sleep. Turn on lots of lights, which will trick your body into waking up and feeling better. ____ You get double the benefits if it is daytime.

     Take a break. Taking a little break will help you in the long run. Turn up some energizing music to get yourself positive. Relax and talk to a friend in person or on the phone for a few minutes.____

A. Keep it cool

B. Calm down and sleep

C. Avoid big, heavy meals as they will make you tired

D. Going outside whether it is day or night for some fresh air

E. Missing sleep regularly can make you sick and should be avoided

F. When you are tired, you may just want to sit around and do nothing

G. Having a good time for a few minutes will refresh you quicker than anything else.