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中学化学实验的主要类型有哪些？比较各种分类方法的特点。

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下列关于自选图形的描述中，错误的是（）。

A. 依次单击各个自选图形可以选择多个图形
B. 单击绘图工具条上的“选择对象”按钮，在文本区内单击鼠标拖动一个范围，把将要选择的自选图形包括在内
C. 按住Shift或Ctrl键，依次单击各个自选图形可以选择多个图形
D. 双击自选图形，就可以设置自选图形格式

You will see a new doctor in a hospital near London if you go there. He is very clever but never speaks. And he didn’t go to medical school. He can work 24 hours a day and never gets tired. He is one meter tall and has a face like a TV screen. Can you guess who he is He is Dr. Robot.Doctors often need to ask their patients many questions. Busy doctors can only spend a few minutes with each patient. But Dr. Robot can ask a patient questions for an hour if it is necessary. With the help of Dr. Robot, a human doctor can have a lot of useful information when he examines his patient. How can Dr. Robot do this A computer ’tells’ him what to do. In what way can the new doctor help other doctorsHe can give them ().

will have worked (work) () for three months, the engineer finished a complicated design.

A3/A4型题女性，28岁，反复水肿4年，近日来厌食、恶心，伴齿龈出血，一日来排柏油样便且逐渐昏迷，血压160/100mmHg，双下肢有出血点，呼吸深大，Hb70g/L，一年前患肝炎已愈。此患者出血的主要原因是（）.

A. 电解质紊乱
B. 尿毒症
C. 贫血
D. 血小板减少
E. 凝血因子有不同的程度的缺乏