解方程2x+52-2x-53=1.

题型:解答题

问题:

解方程
2x+5
2
-
2x-5
3
=1
考点:一元一次方程的解法
题型:解答题

读下图,完成下列要求。

(1)图中F是                (国家);D是                半岛,属于            洲。

(2)A为                河,自          向         (方向)注入B                 海,其下游建有水坝C为                   

                  ,大坝以上形成巨大的纳塞尔水库。水坝建成后,带来了一系列影响,请你判断并选择出哪

    些是有利影响                                  ;哪些是不利影响                               (写序号)。

    ① 防止了旱涝灾害,全年有水灌溉

    ② 扩大了耕地面积,促进了农业发展

    ③ 再也没有河水泛滥带来肥沃淤泥,而需要购买化肥

    ④ 每年发电100亿度,提供了大量动力 

    ⑤ 淹没了库区周围的土地

    ⑥ 下游滋生钉螺,传播血吸虫病

    ⑦ 下游水量减少,海潮上溯引起土壤盐渍化

    ⑧ 水坝以下,水流平缓,便于航运

    ⑨ 纳赛尔水库可发展渔业

    ⑩ 引起了尼罗河流域生态环境变化

题型:解答题

阅读理解。

                                 Manners (礼貌) at an English Tea Party

     For the host (主人):

     Most importantly, the tea should be served in a friendly way, and the action of serving tea has to be

well-mannered.

     Prepare some milk and hot water so that the guests can have their tea the way they like.

     Prepare more tea and cake than guests will need, so they'll feel comfortable and eat as much as they want.

If possible, prepare the food by yourself.

     For the guess (客人):

     If you're invited to a tea party and would like to bring something to the party, food that you've made or

flowers will be most welcome. It may be a good idea to discuss it with the people that have been to such a

party many times.

    At the party, you may drink as much as you want. However, you need to finish the cup of tea before

passing it to the host for more.

    If the tea is too strong or bitter (苦的), you can use hot water to make it weaker.

    If some sandwiches or cookies are served, take only one at a time, and then pass them to the next person.

Don't break a cookie into small pieces.

1. If you're the host, you ___________.

A. must serve the tea in a friendly way

B. should buy as much food as you can for the party

C. should prepare some presents for the guests

D. must serve the same tea to all the guests

2. If you're a guest, ___________.

A. you're not allowed to drink more than three cups of tea

B. you'd better prepare a present for the host

C. you can eat only one cookie

A. you can take one sandwich and one cookie at a time

3. From the reading, we know that we should ___________.

A. not drink too much while having tea

B. not make any noise while having tea

C. keep smiling and talking all the time

D. not ask for a second cup of tea until you finish the first one

4. We can infer (推测) from the reading that ___________.

A. you have to drink all the tea even if it's a little bitter

B. the host must cook the food for the tea party by himself

C. it's impolite to drink tea while eating

D. good manners are very important

5. If it's the first time for you to go to an English tea party, you' better ___________.

A. make some food yourself at home

B. ask the host what you should bring

C. ask other people who have already been to a party like that many times for advice

D. Take the tea you like with you to the party

题型:解答题

电流用符号______表示,单位是______,简称______,符号是______.

题型:解答题

右图为“气压带、风带分布示意图”。读图完成题。

小题1:图中乙风带的名称是

A.极地东风带

B.盛行西风带

C.东北信风带

D.东南信风带小题2:地中海沿岸夏季高温少雨,冬季温和湿润是由于

A.甲气压带与乙风带交替控制

B.乙风带与丙气压带交替控制

C.丙气压带与丁风带交替控制

D.全年受乙风带影响

题型:解答题

He helps me ____ with my English. [ ]

A. a lot

B. a lot of

C. lots of

D. lot of

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