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问题 单项选择题

喘证的特征除外下列哪项

A．呼吸困难
B．张口抬肩
C．胸高胀满
D．鼻翼煽动
E．不能平卧

答案

参考答案：C

根据图片，说一说它们在中国的历史：

（1）

（2）

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

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问答题 简答题

影响水泥比表面积测定的因素有哪些？
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