桡骨头半脱位多见于（） A.0～5岁 B.5～10岁 C.11～15岁 D.15～2

You want to know about my staying in America, right? Well, to tell you the truth, it is really an eye-opening experience to study here.

In China, I had English classes five times a week since fifth grade. However, I didn’t know how different textbook English could be from everyday English until I came to Hotchkiss School, Connecticut.

When I first studied English, I was told to say,” I am fine” when people say “How are you?” But in the US, I found that people say, “I am good” or “I’m tired”.

One day, someone greeted me with “What’s up?” It made me confused . I thought for a moment and then smiled because I didn’t know what to say.

Since then, I have discovered more and more differences between Chinese and US cultures.

To my surprise, US girls spend a lot of time in the burning sun to get a tan(晒黑). However, in China, girls try every possible way to get their skin paler, or “whiter”.

I was also surprised by how hardworking US students are.  In China, schoolwork is almost everything, so we study hard and that’s it. But here, a “good” student gets good grades, does a lot for the public and plays sports or music.

The kids here are so talented, I am starting to be sorry that I gave up playing the piano at an early age and that I have never thought about sports.

小题1: What does the word “confused” in the fourth paragraph mean in Chinese ?

A．困惑

B．憧憬

C．悲痛

D．后悔小题2:A good US student spends his / her time ______ .

A．only in doing homework

B．on studies, sports or music and public work

C．only in working for the public

D．only on sports or music小题3:Which of the following is NOT true ?

A．The writer is now in US.

B．American girls love to have white skin.

C．US students are talented and hard working.

D．The writer regrets that he gave up playing the piano.

玉米在遗传学研究方面备受青睐，主要原因有：正常玉米植株是雌雄异花，有利于杂交处理；后代个体多，有利于增强统计结果的真实性；有便于区分相对性状等。请根据以下信息回答问题：

(1)玉米体细胞内有10对同源染色体，如对玉米的基因组进行测定的话，需要检测_________条染色体。

(2)玉米的雌雄花是同株还是异株，受A/a和B/b两对独立遗传的等位基因控制。已知当A和B基因同时存在时玉米为正常植株(顶部开雄花，中部开雌花)，不含B基因的植株为雌株(只开雌花)，其余基因型的植株为雄株(只开雄花)。亲本基因型为AaBb的植株自交，F₁的表现型及比例为_________利用亲本，可通过__________育种方法茌短时间内得到纯合的雌株和雄株，获得的植株中雌株和雄株分别占___________。

(3)高茎胚乳红色的植株与矮茎胚乳白色的植株杂交，F₁全是高茎胚乳红色的植株，用表现型为___________的植株与F₁进行测交，对测交后代进行统计，结果后代只有高茎胚乳红色2050株和矮茎胚乳白色1980株。结果是否符合孟德尔的自由组合定律？____________。为什么？____________。

角膜反射检查的正确描述是

A．用棉签细毛轻触角膜中央部位

B．正常反射是两侧眼睑迅速闭合

C．是深反射的一种

D．浅昏迷时角膜反射消失

E．角膜反射消失的临床意义同巴彬斯基征阳性

A市的甲公司和B市的乙公司互发E—mail协商洽谈合同，4月3日甲公司发E—mail给乙公司称：“我公司有宇宙牌笔记本电脑100台，顶级配置，以每台9000元价格请贵公司代为出售，按销售总额的10%提成”。4月5日乙公司回复称：“货物可以，价格偏高，每台8000元可以接受”。4月8日甲公司回复： “每台8000元可以出售，但提成9%”。4月10日乙公司回复：“同意”。甲公司于4月11日收到该回复后，双方签订了合同。
合同签订后，乙公司以自己的名义与丙公司又签订了供应100台电脑的合同，每台价格为8100元，乙公司负责送货上门。
丙公司为储存电脑租赁了丁公司仓库，4月20日乙公司送货。交货时丙公司发现电脑运行速度明显比正常的慢，比约定的标准差得多，无法正常使用，便拒绝接收。

关于乙公司以自己的名义与丙公司签订合同的行为的说法，正确的是( )。

A．作为受托人，乙公司可以以自己的名义在代理权限内签订合同

B．如果丙公司知道甲乙公司之间的代理关系，则该合同可以直接约束甲乙公司

C．如果丙公司知道甲乙公司之间的代理关系，则该合同为可撤销合同

D．经甲公司同意后，乙公司才可以以自己的名义签订合同

吊钩做负荷试验，其开口度在没有任何显著的缺陷和变形下，不应超过( )。

A．0.25%
B．0.5%
C．0.7%
D．1.0%