做功和热传递是改变物体内能的两种方式.其中“神舟”六号飞船返回舱返回地面过程中表面内能增大,这是 方式;太阳把地面上的物体晒热内能增大,这是 方式。
做功、热传递
句型转换。
1. The bus is crowded, ? (完成反意疑问句)
2. Have they been ready?(作肯定回答)
.
3. They were so tired that they couldn't walk anylonger.(改为同义句)
They were _ tired _ walk anylonger.
4. They spent five years building the building.(改为同义句)
It them five years to the building.
5. He left after the bus came to the stop.(改为同义句)
He _ leave the bus came to the stop.
某袋装水泥原价为350元/t,供销部门手续费费率为4%,运杂费18元/t,二次运输费 5元/t,运输损耗率为1%,采购保管费率为2%,则每吨水泥采购保管费为( )元。
A.7.71
B.7.43
C.7.36
D.7.00