【判断题】紫外光谱属于电子光谱,而红外光谱属于分子光谱,故紫外光谱的专属性强。()
【单选题】PowerPoint演示文稿文件以()为扩展名进行保存
【单选题】按连续介质概念,流体质点是:
D.
几何尺寸在宏观上同流动特征尺度相比是微小量,又含有大量分子的微元体
【单选题】As a great innovator in American literature, Walt Whitman wrote his poetry in an unconventional style which is now called _______; that is _______.( )
A.
hymn...poetry with chanting refrains
B.
blank verse...poetry without rhymes at the end of the lines but with a fixed beat
C.
free verse...poetry without a fixed beat or regular rhyme scheme
D.
ode...poetry in an irregular metric form and expressing noble feelings
【判断题】当修筑道路和桥梁时,配制水泥混凝土除了水泥,还需要加入粉煤灰来提高抗开裂性。
【单选题】PowerPoint演示文稿文件以( )为扩展名进行保存
【单选题】ISO18000-3、ISO14443和ISO15693这三项通信协议针对的是 RFID系统。