Using LanguageⅡ第二课时 公开课

What is cloning?

We define cloning as production of a cell or organism with the same nuclear genome as another cell or organism.

Cloning

is the process of creating an identical copy of an original. A clone in the biological sense, therefore, is a single cell (like bacteria, lymphocytes etc.) or multi-cellular organism that is genetically identical to another living organism. Sometimes this can refer to "natural" clones made either when an organism reproduces asexually or when two genetically identical individuals are produced by accident (as with identical twins), but in common parlance the clone is an identical copy by some conscious design. Also see clone (genetics). The term clone is derived from the Greek word for "twig". In horticulture, the spelling clon was used until the twentieth century; the final e came into use to indicate the vowel is a "long o" instead of a "short o". Since the term entered the popular lexicon in a more general context, the spelling clone has been used exclusively. III. Reading aloud to the recording

Whole language teachers affirm that reading aloud teaches you the students about language in a way that silent or independent reading never can. Reading aloud to the tape helps you the students develop and improve language skills -- reading, writing, speaking, and listening. And since you the students listen on a higher level than you read, listening to other readers stimulates growth and understanding of vocabulary and language patterns. So why not hurry to listen and read to the tape-recording of the text we are going to learn today? IV.

Reading for forms

Read the text again to: cut/ the sentence into thought groups, blacken

the predicates, darken the connectives and underline all the useful expressions. V. Copying and making sentences

You are asked to copy all the useful expressions into your notebook after class as homework. You may make your own sentences with each of these expressions.