【简答题】已知A、B、C、D、E都是周期表中前四周期的元素,它们的核电荷数A<B<C<D<E。其中A、B、C是同一周期的非金属元素。C元素原子核外最外层电子数是其次外层电子数的3倍,D原子比C原子多一个电子层,化合物DC的晶体为离子晶体。AC 2 为非极性分子。B、C的氢化物的沸点比它们同族相邻周期元素氢化物的沸点高。E的原子序数为24,ECl 3 能与B、C的氢化物形成六配位的配合物,且两种配体的物质的量...
【简答题】A.The driver didn't use her turn signals. B.The driver didn't come to a complete stop. C.The driver failed to yield to other drivers. D.The driver didn't horn to the passengers-by.
【单选题】The hotel manager arranged ___ my luggage to my room.
B.
for the driver to take
【单选题】On no account______held responsible for the car accident.
【简答题】A.The driver of the sports car. B.The two girls inside the car. C.The bus driver. D.Paul.