【单选题】The word 'jump' in Line 3, Para. 5 can be replaced by ______ .
【判断题】Skip one line between the title and the first line of the text.
【判断题】For the body of the letter you can neither indent the first line of each paragraph nor skip a line between paragraphs. ( )
【单选题】... the strategies often become “second nature” to the individual ... (Line 25)
A.
... the strategies often make the individual more natural ...
B.
... the strategies often are part of the individual ...
C.
... the strategies often enable the individual to act naturally ...
【单选题】(21~23题共用题干) 氨基酸是构成蛋白质的基本单位,一般分为必需氨基酸和非必需氨基酸两大类。蛋白质是由许多氨基酸以肽键连接在一起,并形成一定空间结构的大分子,不同的蛋白质有不同的氨基酸模式,食物蛋白质氨基酸模式越接近人体蛋白质氨基酸模式,其必需氨基酸在体内的利用率越高,这些蛋白质称为优质蛋白。 23.下列属于优质蛋白质食物的是( )
【单选题】Please give me the reason you often skip classes.