【判断题】试样产生红外吸收光谱应满足两个条件:一是红外辐射的能量应与振动能级差相匹配,即E光=△Eν,二是分子在振动过程中偶极矩的变化必须不为零。
【单选题】The word 'justify' in Sentence 3, Paragraph 3 is closest in meaning to '______'.
【简答题】The word“deforestation”in Paragraph 3 means__________.
【单选题】GPS定位时,信号传播过程中引起的误差主要包括大气折射的影响和( )
【单选题】一项发明专利权被专利复审委员会宣告无效,该专利权的效力应当( )。
【简答题】The word 'springs' in Paragraph 3 means
【单选题】下列程序的输出结果为【 】 。 #include int fun(int m,int n) { return(m*m + n*n); } int main() { int m=3,n=4,k; k=fun(m,n); printf("%d\n",k); return 0; }
【简答题】The word “scrutiny” (Line 3, Para. 3) most probably means “__________”
【单选题】(n.) a person who is good at or who often does sports