My school is _____ the end of the second road.[ ]
A. on
B. in
C. at
D. of
答案：C
下列有机反应中，不属于取代反应的是 [ ]
A.
B. 2CH3CH2OH+O22CH3CHO+2H2O
C. ClCH2CH=CH2+NaOHHOCH2CH=CH2+NaCl
D. +HONO2+H2O+H2O
根据我国《合同法》规定，商业广告一律不为要约。 ( )
2CH3CHO+2H2O 
HOCH2CH=CH2+NaCl 
+HONO2+H2O
+H2O