水准测量时，计算校核∑h=∑a-∑b和∑h=-可分别校核下列中哪两项是否具有误差（）

阿根廷和智利之间的国界线是 （    ）

A．设立界碑为标志

B．设立栅栏为标志

C．设立界墙为标志

D．安第斯山为界

三袋米的故事

①儿子刚上小学时，父亲去世了，母亲没改嫁，含辛茹苦地拉扯着儿子。那时村里没通电，儿子每晚在油灯下书声朗朗、写写画画[A]母亲拿着针线，轻轻地、细细地将母爱密密缝进儿子的衣衫，日复一日，年复一年，[B]当一张张奖状覆盖了两面辩驳陆离的土墙时，儿子也像春天的翠竹，噌噌地往上长。望着高出自己半头的儿子，母亲眼角的皱纹长满了笑意。
②当满山的树木泛出秋意时，儿子考上了县一中。母亲却患上了严重的风湿病，干不了农活，有时连饭都吃不饱。那时的一中，学生每月都得带30斤米交给食堂，对于这个家庭来说，无疑是雪上加霜。
③没多久，母亲一瘸一拐地挪进学校食堂，气喘吁吁地从肩上卸下一袋米。负责掌秤登记的熊师傅打开袋口，抓起一把米看了看，眉头就锁紧了，说：“你们这些做家长的，总喜欢占点小便宜。你看看，这里有早稻、中稻、晚稻，还有细米、粗米，简直把我们食堂当杂米桶了。”这位母亲臊红了脸，连声说对不起。熊师傅见状，没再说什么，收了。
④又一个月初，这住母亲背着一袋米走进食堂。熊师傅照例开袋，眉头又锁紧，还是杂色米。他想，是不是上次没给这位母亲交代清楚，便一字一顿地对她说：“不管什么米，我们都收。但品种要分开，千万不能混在一起，否则没法煮，煮出的饭也是夹生的。下次还这样，我就不收了。”母亲不敢吱声，低着头一瘸一拐地离开了食堂。
⑤第三个月初，母亲又来了，熊师傅一看米，勃然大怒，用几乎失去理智的语气，毛辣辣地呵斥：“哎，我说你这个做妈的，怎么顽固不化呀咋还是杂色米呢你呀，今天是怎么背来曲，就怎样背回去!”
⑥母亲似乎早有预料，两行热泪顺着凹陷无神的眼眶涌出：“大师傅，我跟您实说了吧，这米是我讨……讨饭得来的啊!”熊师傅大吃一惊，眼睛瞪得溜圆，半晌说不出话来。
⑦母亲坐在地上，挽起裤腿，露出一双肿大的僵硬的变形的腿。母亲抹了一把泪，说：“我得了晚期风湿病，连走路都困难，更甭说种田了。儿子懂事，要退学帮我，被我一巴掌打到了学校……”
⑧校长知道了这件事，不动声色，以特困生的名义减免了儿子三年的学费与生活费。三年后，儿子以优异的成绩考进了清华大学。欢送毕业生那天，县一中锣鼓喧天，校长特意将这位母亲的儿子请上 * * 台，此生纳闷：考了高分的同学有好几个，为什么单单请我上台呢更令人奇怪的是，台上还堆着三只鼓囊囊的麻布袋。此时，熊师傅上台讲了母亲讨米供儿上学的故事，台下鸦雀无声。校长指着三只麻布袋，情绪激动地说；“这就是故事中的母亲讨得的三袋米，这是世上用金钱买不到的粮食。下面有请这位伟大的母亲上台。”
⑨儿子疑惑地往下看，只见熊师傅扶着母亲正一步一步往前走。我们不知儿子那一刻在想什么，相信给他的那份震撼绝不亚于惊涛骇浪。于是，人间最温情的一幕上演了，母子俩对视着，母亲的目光暖暖的、柔柔的，一绺儿花白的头发散乱地搭在额前，儿子猛扑上前，搂住她，号啕大哭：“娘啊，我的娘啊……” (选自文章阅读网，有删改)

“父爱如山，母爱如水。”请你联系自己的实际谈谈对父(母)爱的感受。要求情感真挚，小少于50字。

Everyone has got two personalities-the one that is shown to the world and the other that is secret and real. You don’t show your secret personality when you’re awake because you can control your behavior, but when you’re asleep, your sleeping position shows the real you. In a normal night, of course, people frequently change their positions. The important position is the one that you go to sleep in.

If you go to sleep on your back, you’re a very open person. You normally trust people and you are easily influenced by fashion or new ideas. You don’t like to displease people. So you never express your real feelings. You’re quite shy and you aren’t quite sure of yourself.

If you sleep on your stomach, you are a rather secretive person. You worry a lot and you’re always easily upset. You always stick to your own opinions or judgment, but you don’t raise your hopes too much. You usually live for today not tomorrow. This means that you enjoy having a good time.

If you sleep curled up, you are probably a very nervous person. You have a low opinion of yourself and so you’re often defensive. You’re shy and you don’t normally like meeting people. You prefer to be on your own. You’re easily hurt.

If you sleep on your side, you have usually got a well—balanced personality. You know your strengths and weakness. You’re usually careful. You believe in yourself. You sometimes feel anxious, but you don’t often get sad. You always insist on what you think even if it makes people rather angry.

小题1:According to the passage, a person, who is not willing to change his mind and hard to deal with, probably sleeps           .

A．on his side

B．on his back

C．curled up

D．on his stomach小题2:If a person prefers to sleep curled up rather than on his back, he may be well content to    .

A．do things personally.

B．stay alone

C．keep things secret

D．trust others easily小题3:Which of the following people, in the author’s opinion, most likely have personalities opposite to each other ?

A．The people sleeping on their stomachs and those sleeping on his backs.

B．The people sleeping on their sides and those sleeping curled up.

C．The people sleeping on their backs and those sleeping on their sides.

D．The people sleeping curled up and those sleeping on their stomach.小题4:What the author mainly intends to tell us is that            .

A．one’s sleeping position has something to do with one’s character.

B．everyone has got both real and secret personalities.

C．the position in which one goes to sleep is the most important one.

D．when awake, one does not show one’s secret personality.

（1）根据如图（甲）所示的实物图，在（乙）虚线框内画出对应的电路图。

（2）如图所示，作出：①水桶M所受重力的示意图；②以O为支点，作出力F的力臂。

（3）一条光线斜射到水面发生反射和折射，这条光线经水面折射后的光线如图所示。请在图中画出它的入射光线和反射光线。

体现医生业务水平高低的是（）

A.对疑似精神病患者应进行详细的检查，防止误诊误治

B.详细向精神病患者家属解释有关的治疗方案

C.尊重精神病患者的人格，对其恢复期应进行心理辅导

D.为防止精神病患者出现过激行为，严格限制其自由是必要的

E.精神病患者的病情不宜公开