每年的6月26日是世界禁毒日，是为了纪念中国近代史上一重大事件而设的，下面漫画中

检查软件产品是否符合需求定义的过程称为 ( )

A．确认测试

B．集成测试

C．验证测试

D．验收测试

慢性肺心病出现右心衰竭时，以下哪项可能不是心衰的表现

A．双肺底湿哕音
B．肝大
C．双下肢水肿
D．胸腔积液
E．肝颈静脉回流征阳性

进行血液透析治疗时，其观察的主要内容是血流量、透析负压及静脉压数据。

Passage 2

Which of the following is NOT a reason of the failure to take preventive medical tests like a breast cancer screening a. Some Americans are not willing to invest in tests that might not find any problem b. Doctors are often busy and cannot afford enough time on preventive medical tests. c. Patients and doctors do not know exactly which preventive tests are really beneficial. d. There is inadequate investment in equipment and the existing tests are not effective.

皮带机大修时滚筒与托辊部分的质量标准是什么？