12.维新变法运动期间一位士大夫在日记中谈到: “现在以下乡开化为宜,论悯其愚,不忍不教;欲 资其力,不得不教。且官场之因循,世家之骄奢,
What ____ you _____ at that time last night? A. did; do B. were; doing C. are; doing D. was; doing
右图是短周期元素周期表的部分结构,A、B、C、D、E是其中的五种元素,下列说法错误的是…… DC A E B A.元素非金属性比较:A>B>EB
3.填入下面一段文字横线处的语句,最恰当的一项是 人们只知道噪声影响听力,其实噪声还影响视力。试验表明:当噪声强度达到90分贝时。人的视觉
某元素的原子最外层只有一个电子,它与卤素结合时,所形成的化学键( ) A.一定是离子键 B.一定是共价键
I wondered ______ they had raised so much money on their own to help youngsters in need. A. what B. that C. how
Internet access and power outlets available in most cafes in the.developed world might reduce your productivity. A typical tale from store managers is of customers who buy a single cup of coffee
如图所示,a、b是两根石墨棒,下列叙述不正确的是( ) A.往滤纸上滴加酚酞试液,b极附近颜色变红 B.a是正极,发生还原反应,b是负极,发生氧