急性腹痛伴休克．最常见的病因是（）
A.急性心肌梗死
B.大叶性肺炎
C.胃、十二指肠溃疡穿孔
D.急性坏死性胰腺炎
E.急性坏疽性胆囊炎
参考答案：D
The museum was___opened this morning and some officials attended the opening ceremony(开幕式).
A．globally
B．obviously
C．historically
D．officially
目视法计数白细胞的质量考核办法有哪些?
