【单选题】Leaving the court, the families all tried to put on a brave face . The underlined part means .
D.
not show their sadness or worry
【单选题】. Jane with the Greens ____ the Great Wall if it ______ tomorrow.
A.
is leaving for, isn’t rainy
B.
are leaving for, doesn’t rain
C.
is leaving for, won’t rain
D.
are leaving for, isn’t rainy
【单选题】关于成熟红细胞形态结构的描述错误的是哪一项
【简答题】习题1-11 一个线偏振光束其E场的垂直于入射面,此光束在空气中以45°照射到空气玻璃分界面上。假设 n g =1.6,试确定反射系数和透射系数。
【单选题】My sister _____ here next week. [ ]