问题
填空题
现有甲乙两个光源,一个能产生红外线,一个能产生紫外线,但是光源上无任何标志,小明为了区分它们,就取来一张50元的钞票,发现当钞票放在甲灯下时,钞票上显出闪亮的荧光印记,放在乙灯下钞票很快变热,但是不能看出荧光标记。由此可知甲灯为__________灯,乙灯为__________灯。
答案
紫外线,红外线
现有甲乙两个光源,一个能产生红外线,一个能产生紫外线,但是光源上无任何标志,小明为了区分它们,就取来一张50元的钞票,发现当钞票放在甲灯下时,钞票上显出闪亮的荧光印记,放在乙灯下钞票很快变热,但是不能看出荧光标记。由此可知甲灯为__________灯,乙灯为__________灯。
紫外线,红外线
短文改错。 此题要求改正所给短文的错误。对标有题号的每一行作出判断: 如有错误(每行只有一个错误),则按下列情况改正: 该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用 斜线划掉。 该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。 该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。 | |
I began to learn an English language three years before. Now I'm happy to say I have make rapid progress in it, though I still have many difficulty. English is not an easy language, and I find it very interesting. When I first started learn it, I thought I had only to remember some new words and learned some grammar. Late I realized that I had to pay more attention to pronunciation, spelling or English idioms. Only in this way can we learn English good. | 1. _____ |