【单选题】How was the duck in the pond killed?
A.
Marcus threw a big stone at the duck.
B.
Marcus threw a hard loaf at the duck.
C.
The duck ate some poison in the pond.
D.
Will put some poison in the pond.
【判断题】惠斯通电桥测电阻时,若比例臂选择不当,会影响测量结果的有效位数。
【单选题】我国《传染病防治法》规定的甲类传染病包括
【简答题】我国《传染病防治法》规定的甲类传染病包括 A .鼠疫、艾滋病 B .鼠疫、霍乱 C .鼠疫、霍乱、艾滋病 D .鼠疫、霍乱、伤寒和副伤寒 E .鼠疫、霍乱、艾滋病、伤寒和副伤寒