七巧板
参考答案:
汉族名间智力玩具,从唐代流传至今不衰。是将一正方形切割为五个小勾股形板的块状玩具,可以拼接成人物、动植物、房庭楼阁、车轿桥船等形状。可以阐明若干几何原理。
女性,51岁,急性化脓性胆管炎,B型超声波检查显示胆总管扩张、下端有结石数枚。血pH值7.30,脉搏124次/分,血压10.7/8kPa(80/60mmHg)。正确的治疗原则是()。
A.经短期积极抗休克治疗后做胆总管引流术
B.立即手术引流胆总管
C.大量输液,待血压正常后及早手术
D.联合应用广谱抗生素,不手术
E.先纠正酸中毒后再手术
The US Food and Drug Administration (FDA) is taking steps to protect the country’s blood supply. People give blood to the centers, where it is kept until it is needed for medical purposes. The FDA has provided new rules for the blood centers. The government agency says new rules are designed to improve the blood supply system. The new rules call for blood centers to develop more ways to make sure their work is done correctly. These rules are another way to help keep the blood supply pure. A leading concern is that someone with AIDS virus might give blood to a blood center. For this reason, there are tests to find out if blood contains viruses that cause AIDS and other disease. Each year blood transfusion has saved millions of lives, however, if there is no secure blood, it’s increasingly risky for the recipient of blood to be infected with HIV.