21.electronic adj.电子的→electric adj.电的；电动的→electrical adj.电的；电气科学的

　　22.specialist n．专家→special adj.专门的；特殊的

　　23.poison n．毒药；毒物→poisonous adj.有毒的

　　24.permit vt.允许；准许；许可→permission n．允许；准许

　　25.declare vt.宣告；宣布→declaration n．宣布

　　26.exploration n．检测；探险→explore vt.探测，探险 用所给词的适当形式填空1.Having survived starvation (starve), we're beginning to live happily.

　　2.The leaves of certain trees are poisonous (poison) to cattle.

　　3.The use of certain chemicals has now been declared (declaration) illegal.

　　4.The professor is a specialist (special) of studying a criminal's psychology.

　　5.We are trying to assess how well the system works and the assessment will be subscribed to the committee.(assess)

　　6.With the development of technology,_this kind of technique is quite popular, for there are many technical training centers of this kind. (technology)

　　7.In our school, the students are not permitted to use phones and without permission they can't leave school during weekdays.(permit)

　　8.As an assistant,_he assisted the professor in carrying out the project.And without his assistance,_it couldn't be completed on time. (assist)

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