【判断题】Spoken material is often heard many times in most cases like written material.
【判断题】Paving meansa surface of flat stones or material like stone on the ground, which is only used in urban space.
【单选题】( ) is material like a net made from wire, thread, or plastic.
【单选题】下列句子中的“故”字的意义,与其他三项不同的一项是
【单选题】下列各项中,不属于原始凭证所包括的基本内容的是()
【多选题】机器人是一种自动化的复杂的机器,其复杂性在:
【判断题】电子商务礼仪是无纸化交易,所以传统的商业应用文的写作技巧就没有那么重要了。
【单选题】A key difference between a thermoplastic polymer and an elastomeric material like rubber is that ______.
A.
rubber has a relatively small number of covalent crosslinks and thermoplastic polymers have none
B.
thermoplastics don't melt when heated but rubbers do
C.
rubber can be subjected to extensive plastic deformation whereas typical thermoplastics have little plasticity