50 . образец выполнения the pharmacopoeia is a book containing a list of medicinal substances with description, tests and formulas for preparing them. containing- participle i, определение the pharmacopoeia describes also the proper method of packaging and storing. the drug. packaging, storing - gerund, определение в следующих предложениях подчеркните слова с суффиксом -ing и определите, являются они participle i, gerund (см. образец выполнения ). 1. salts containing hydrogen or hydroxide radicals are known to be acids or basic salts. 2. examining the structure of the fruit we determined its principle parts. 3. there are many ways of solving the problem.

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