中国古代，“诚”的用法有多种，其中“精诚”要克服的是（）。A．伪 B．妄 C．曲 D

In many English homes people eat four meals a day, breakfast ,lunch, tea and dinner. People have breakfast at any time from seven to nine in the morning .They eat porridge ,eggs , or bread. English people drink tea or coffee at breakfast. Lunch comes at one o’clock. Afternoon tea is from four to five in the afternoon and dinner is about half past seven. First they have soups, and then they have meat or fish with vegetables. After that they eat some other things, like bananas, apples, or oranges. But not all English people eat like this. Some of them have their dinner in the middle of the day. Their meals are breakfast. dinner ,tea, and supper and all these meals are very necessary.

根据内容，选择正确答案 。

(      ) 1. Many English people have                   meals a day.

A. two         B. three        C. four        D. three or four

(      ) 2. People may have                    for their breakfast

A. tea and eggs                    B. porridge ,eggs bread ,tea or coffee

C. some soup and meat           D. meat and fish

(      ) 3. In many English homes dinner comes                   .

A. at one o’clock      B. about half past seven    C. at noon     D. at night

(      ) 4. What do they eat other fruits?

A. apples      B. oranges          C. bananas     D. both ABC

(      ) 5. When do other people have their dinner?

A. in the middle of the day            B. at night 

C. at noon                         D. in the morning

《粮食流通管理条例》（）年（）月（）日，以国务院令（）号公布施行。

我区某中学化学研究性学习小组为了探究水垢的成因和主要成分，从教材和互联网上查得如下资料：

Ⅰ．锅炉用水硬度高了十分危险，因为锅炉内结垢后不仅浪费燃料，而且会使锅炉内管道局部过热，易引起管道变形或损坏，严重时还可能引起爆炸．

Ⅱ．用适量的盐酸可以将热水瓶胆壁上的水垢[主要成分是Mg（OH）₂和CaCO₃]除去．

Ⅲ．天然水中一般都含有Ca²⁺、Mg²⁺、HCO₃^﹣等离子，在加热条件下，这些离子趋于生成溶解度更小的物质—水垢．

（1）小李同学对该井水进行如下探究，其做法及结论合理的是 _________ ．（填序号）

A、用烧杯取少量该井水，加入适量肥皂水，搅拌，发现有较多浮渣产生，说明该井水为硬水．

B、用烧杯取少量井水，加入一定量活性炭，搅拌、过滤，可吸附井水中的钙、镁离子，并使井水软化．

C、取较多井水，加热煮沸，煮沸后的井水硬度降低．

（2）某同学为了粗略测定某锅炉水垢中CaCO₃的质量分数，取6.0g 样品，逐滴加入稀盐酸至不再产生气泡为止，共生成2.2g CO₂气体．试计算样品中CaCO₃的质量分数．

（3）若要计算上述反应所消耗的盐酸溶液的质量分数，题中还缺少的一个数据是_________．

（4）乙同学设计了下列实验装置进一步探究水垢的成分．其主要操作步骤如下：

①按图组装仪器，将50g水垢试样放入锥形瓶中，加入足量某酸溶液；

②测量一定时间内干燥管内物质增加的质量（见下列曲线）；

③待锥形瓶中不再产生气泡时，打开活塞B，从导管A处缓缓鼓入一定量的空气；

④再次称量干燥管内物质增加的质量；

⑤重复③和④的操作，直至干燥管内物质质量不变．研究性小组的同学通过简单计算，认为水垢中一定含有少量MgCO₃，理由是_________．

咯血患者ANCA阻性常见于（）.

A.支气管扩张

B.肺出血-肾炎（GoodpasturE.综合征

C.原发性小血管炎

D.白塞综合征

E.特发性肺含铁血黄素沉着症

为什么公共交通补贴是合理的？