涂布楼地面主要是（）代替水泥或部分水泥，再加入填料、颜料等混合调制而成的材料，硬化以后形成（）的面层。
参考答案：合成树脂 ；整体无缝
根据句意及汉语或首字母提示，填写恰当的单词。
1. It's not right to _________ (浪费) time or money.
2. The cold weather ________ (造成) many plants to die last year.
3. Since my sister started high school, her________ (日常的) life has changed.
4. It's bad for your teeth to eat c_________ all the time.
5. Juan Antonio Samaranch's d_________ made all of us sad.
构成4M×8bit的存储器，若采用128K×16bit的芯片，需 (274) 片：若采用512K×1bit的芯片，需 (275) 片。
A．8 B．16 C．32 D．64
