酱酒的三种典型体的确立与命名是如何完成的？

已知圆锥的底面半径为1cm，母线长为3cm，则圆锥的侧面展开图中弧长是（    ）cm，面积是（    ）cm²。

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为l6-25的相应位置上。

It was a cold and cloudy afternoon. I was on the bus with my children, aged four and two, heading home when it started to rain. I realized this would mean a wet walk home   小题1:  the bus stop.

Home was only two blocks away   小题2: it was not a pleasant walk with one small boy fast asleep in the pram (手推婴儿车), the other one in a raincoat and no umbrella for myself. A pick-up truck passed us on the road and, a few minutes later, I saw it   小题3:  (pull) back and the driver looking directly at us.

A young man put the window down. “Hey, here’s an umbrella for you --- please take it.” He called out.

I stood there   小题4: (astonish), barely believing that the man,   小题5:  existence was unknown to me only moments ago, could be so   小题6: (thought). “Come on, give this to your mummy,” he said to my older son. I gratefully accepted the offer,   小题7: (thank) him and watched the truck disappear down the road.

This man might have needed the umbrella for   小题8: later during the day but preferred to give it to me. It was a lesson to me   小题9: it’s possible to give without expecting anything   小题10: return.

关于肩关节前后位摄影，错误的是（）

A.显示肱骨头与关节盂关节间隙的切线像

B.身体矢状面必须平行于胶片

C.肩胛骨喙突对准胶片中心

D.中心线对准喙突投射

E.可检查肱骨近端骨质病变

肉桂酸是重要的有机合成中间体，广泛用于医药、香料、塑料和感光树脂等化工产品中．肉桂酸的结构简式为请回答下列问题．

（1）肉桂酸的分子式是______．

（2）写出肉桂酸的顺式结构______．

（3）肉桂酸与乙醇在一定条件下发生反应的化学方程式是______．

（4）已知：

由苯甲醛制备肉桂酸的合成路线如下：

①上述合成路线中，反应I中氧化剂可选择______（填写正确选项的字母）．

a．高锰酸钾酸性溶液b．新制氧氧化铜c．溴的四氯化碳溶液

②苯甲醛与有机物X反应生成A的化学方程式是______．

女性，48岁。因左肩痛3个月逐渐加重，不能梳头，左肩关节外展、后伸受限，三角肌萎缩，无手臂麻木感。最可能的原因是（）

A.颈椎病

B.肩部肿瘤

C.肩周炎

D.肩关节结核

E.风湿性关节炎