【单选题】A sudden scream ______ the silence of the room. There's no time to cover the children's ears.
【简答题】Let ’ s go shopping today.( 变反义疑问句 ) Let ’ s go shopping today , _______ ______?
【判断题】高炉常炼生铁一般分为炼钢用生铁、铸造机件和工具用的铸造生铁及作铁合金用的硅、锰铁。
【单选题】Fatal highway crashes are due to ______.
A.
drivers' sudden shifts in feeling
B.
traffic jams on the highway
C.
wildly careless aggressive driving
D.
mass production of alcohol
【判断题】高炉常炼生铁一般分为炼钢用生铁、铸造机件和工具用的铸造生铁及作铁合金用的硅、锰铁。
【单选题】_________ is the death of heart muscle due to sudden deprivation of oxygen in circulating blood.