A more practical way of keeping ideas secret would have been to write in a specially developed code（密碼）. ItIt is exactly what the expert is doing.
【考點(diǎn)】it指代上文提到事物、群體、想法．
【答案】It
【解答】
【點(diǎn)評(píng)】
聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書(shū)面同意，不得復(fù)制發(fā)布。
發(fā)布：2024/5/27 14:0:0組卷：2引用：1難度：0.7
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