There (1).........many simple things we can do to stop the (2).........of the environment. First of all, we should not dump our rubbish without (3)............which things, such as bottles and paper can (4)...........We should put objectives that we can recycle in (5)............bins. Secondly, instead of talking our car wherever we go, we ought to leave it at home (6)...................possinle, and go on foot or (7)............public transport, when we have to drive to the super maket (8).............our own bads (10)...........we don't need to use the supermarket's platic bads.

Lực tương tác giữa hai điện tích q 1   =   q 2   =   - 7 . 10 - 9 C khi đặt cách nhau 10 cm trong không khí là

A.  32 , 4 . 10 - 10   N .

B.  32 , 4 . 10 - 6   N .

C.  8 , 1 . 10 - 10   N .

D.  44 , 1 . 10 - 6   N