引起禽霍乱(猪肺疫、牛出败)的病原是()
A.多杀性巴氏杆菌
B.沙门氏菌
C.布鲁氏菌
D.链球菌
E.大肠杆菌
参考答案:A
—I called you at 4:00 yesterday afternoon, but no one answered.
—Sorry, I ______ with my friends at that time.[ ]
A. swim
B. swam
C. will swim
D. was swimming
传染性单核细胞增多症主要依据()、()、()、()、()检测进行诊断。