语法急问！大牛救命阿！

语法急问！大牛救命阿！fficeffice" />

(10)Helium is not flammable and ,next to hydrogen ,is......

(a)known the lightest gas

(b)lightest the known gas

(c)the lightest gas known

(d)the known gas lightest

ans：　ｃ　（我选择ａ）

18.Sea horses usually live along the shore among seaweed and other plants to which they cling to by their tails.

Ans : C ( I choose b )

22．Established in 1948 ,the State University of     New York is the singly         largest university system in the United States.

Ans : B

31.(Few substances) look less (alike than) coal and diamonds ,yet both (are fashioned)     (from same) elemental carbon.

Ans : D ( I choose C )

36.In this world of high technology ,it is easy to forget that the most important tools ever developed for learning is still the book.

Ans: C (I choose D )