属于抗凝异常的实验室检查是
A．血vWF测定B．PF3有效性测定C．血栓素B2测定D．血PC测定E．血D-二聚体测定
参考答案：D
什么叫热焓？
Which of the following is true
A．A representative serves for two years.
B．To become a senator is easier than to become a representative.
C．A senator performs his duties for a shorter time than a representative.
D．All presidents were representatives and then senators before becoming president of the United States.
