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在有效不应期刺激心肌细胞都不会发生新的收缩
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房室结是心的正常起搏点
动脉血压>静脉血压>毛细血管血压
用所给动词的适当形式填空一、OurTV set 1._______________(repair)yesterday.二、.A new building 2、__________________(build) in our school next year.三、.Many books on science 3、_________________(buy)since I went to college.四、Now he 4、_________(be)asked if the meeting 5、____________(hold) next Friday.五、.Your schoolbag 6、_______________(must not put)there.六、 7、__________this kind of bike 8、____________(make)in the USA?七、.The PLA 9.____________ (found) on August 1st,1927.八、.By the time he was ten,the boy 10.________(learn )English and French.九、.How long 11._____your uncle 12.____(be)in the city?十、13..______you14.____(see)the film yet?Yes,I 15._______(see) it last week.十一、.Uncle Wang 16.____________(live) here since1980十二、.Listen! Someone 17._________(sing).十三、.Tom 18._______(not have) breakfast yesterday mornig。
中心静脉压正常数值是4~12mmHg
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