参加鼠疫病例尸体解剖的人员,要做好个人防护,防护装备包括()
A、内隔离衣
B、防蚤袜及长筒胶靴
C、帽子和N95口罩
D、外层隔离衣、手套、防护眼镜
参考答案:A, B, C, D
Due to a terrible flu that ________ on, many students don’t show up to school today.
A.goes
B.was going
C.is going
D.has gone
用绳子量井的深度,将绳子2折则多出井外8米,将绳子3折则多出井外1米.井深多少米?用方程和算式两种方法.