两种砂子的细度模数Mx相同时，它们地级配（）。A、一定相同 B、一定不同 C、不一定

太阳发出的可见光、红外线等光线具有能量，照射到物体上，部分被吸收转化为内能（其中红外线尤其显著）。许多车主为了隔热给汽车玻璃贴上太阳膜。某兴趣小组对市场5种品牌隔热性能进行如下探究：

①如图，在暗室中将一侧贴有品牌太阳膜的玻璃板竖直放在水平桌面上，在距离玻璃板左侧20厘米放置一个红外线灯，玻璃板右侧放置一个光能风车（光能风车的风叶在红外线照射下，转动快慢能反映接收到的红外线的强弱）。

②打开红外线灯，观察并记录30秒内光能风车风叶转动的圈数。

③改变红外线灯的位置，使之距离玻璃板的距离分别为40厘米、60厘米、80厘米，重复步骤②。         

④在玻璃板上依次更换其他4种品牌的太阳膜，重复上述实验。

（1）本实验需要的测量工具有             。（写出2种）

（2）透过太阳膜红外线的强弱无法用肉眼直接观察，本实验用光能风车转动快慢来反映红外线的强弱。下列实验或活动所用得方法与本实验相同的有             （可多选）。

（3）为了使本实验的结果更可靠，还需改变哪些变量进行多次实验？       （写出2点）。

  In the earliest stages of man’s development he had no more need of money than animals have. He was content with very simple forms of shelter, made his own rough tools and weapons and could provide food and clothing for himself and his family from natural materials around him. As he became more civilized, however, he began to want better shelter, more efficient tools and weapons, and more comfortable and more lasting clothing than could be provided by his own neighborhood or by the work of his own unskilled hands. For these things he had to turn to the skilled people such as smiths, leather workers or carpenters. It was then that the question of payment arose.

At first he got what he wanted by a simple process of exchange. The smith who had not the time to look after land or cattle was glad to take meat or grain from the farmer in exchange for an axe or a plough (犁). But as more and more goods which had no fixed exchange value came on the market, exchange became too complicated to be satisfactory. Another problem arose when those who made things wanted to get stocks of wood or leather, or iron, but had nothing to offer in exchange until their finished goods were ready.

Thus the difficulties of exchange led by degree to the invention of money. In some countries easily handled things like seeds or shells were given a certain value and farmer, instead of paying the smith for a new axe by giving him some meat or grain, gave him so many shells. If the smith had any shells left when he had bought his food, he could get stocks of the raw materials of his trade. In some countries quite large things such as cows or camels or even big flat stones were used for trade. Later, pieces of metal, bearing values according to the rarity (稀有) of the metal and the size of the pieces, or coins were used. Money as we know it had arrived.

小题1:What does the first paragraph mainly tell us?

A．Man needed little in the earliest stages of development.

B．Man preferred to make tools by himself.

C．How the simple process of exchange arose.

D．What the early man needed from others.小题2:As men became more civilized they __________.

A．all learnt to make by themselves the things needed

B．had to travel a lot to look for what they wanted

C．wanted better things than those they themselves could provide

D．no longer provided food and clothing for themselves小题3:Exchange of goods became difficult because __________.

A．man became more civilized

B．there was not a marketplace for farmers and smiths to exchange their goods

C．farmers hadn’t enough grain or meat to provide for skilled workers

D．more and more goods which had no fixed exchange values appeared on the market.小题4:Money was not used until __________.

A．paper was invented

B．nothing could be offered in exchange

C．people practiced a simple process of exchange

D．the exchange of one thing for another became too complicated小题5: What was used for trade according to the text?

A．Shells

B．Tea

C．Salt

D．Horses

3岁小儿，因水痘来院就诊。该患儿目前皮肤瘙痒严重，护士可以采用的措施是

A．局部涂5%冰片炉甘石洗剂
B．局部涂5%碳酸氢钠溶液
C．局部涂2%龙胆紫溶液
D．约束患儿四肢
E．热水洗浴

张某决定购买一套商品房。经过市场调查，张某与甲开发公司签订了A小区房屋预售合同，并交付了定金。A小区建设完成后，张某前去办理入住手续时，得知甲开发公司已经将预售给张某的房屋卖给了李某，并以李某的名义办理了登记手续。经过交涉没有结果后，张某向人民法院提起诉讼，主张拥有该房屋所有权，但法院经审理判决该房屋所有权属于李某。
李某入住A小区后，发生如下事项：
(1)李某要求租用地下车库的停车位时，被告知车位已满。李某由于没有合适的位置停车，自行将小区内的一块绿地改造为停车位。
(2)由于很多业主对电梯运行状况不满意，经专有部分占建筑物总面积过半数的业主且占总人数过半数的业主同意，业主委员会决定动用专项维修基金对现有电梯进行改造。
要求：根据以上情况并结合《物权法》的规定回答下列问题：

李某自行将小区内的一块绿地改造为停车位的行为是否合法说明理由。

会诊-联络精神医学的具体工作内容不包括（）

A.为非精神科医生提供会诊或联络服务

B.指挥各科医生解决精神心理问题

C.作为医疗团队的一员

D.研究躯体疾病患者的心理反应