能引起人畜共患病的病原菌主要有(),(),().
参考答案:布氏菌、鼠疫杆菌、炭疽杆菌
—Where are my ruler and sharpener?
—______ in your desk.[ ]
A. They is
B. It's
C. These are
D. They're
()电力电缆应采用悬链或立塔式工艺。
A.10kV及以上
B.35kV及以上
C.110kV及以上
D.220kV及以上