【简答题】25°C时,溶液pH值变化1个单位,电池电动势改变( )mV。
【简答题】There are many varieties of quartz including rose quartz, smoky quartz and amethyst.
【简答题】Since Quartz clocks are both inexpensive to produce in mass scale and ______ in performance, they continue to dominate the market.
【多选题】以下哪些防伪措施是在造纸过程中实现的( )
【单选题】Sally as well as her brother ___reading books.
【简答题】Quartz or fused silica is required for work in the _________ region (below 350 nm). Both of these substances are transparent throughout the visible and near-IR regions to about 3 μm wavelength.
【多选题】以下( )防伪措施是在造纸过程中实现的。
【单选题】2006年年初,甲向乙借钱5000元,言明年低归还。到期乙并未向甲要钱,直到2008年年初,甲才向乙表示:“我欠你的钱,再等2个月一定还你。” 这属于诉讼时效中断的法定事由中的:
【多选题】以下( )防伪措施是在造纸过程中实现的。