We give evidence that even though a curricular articulation is present, it is insufficient to cope with the necessity of a robust articulation of uses of trigonometric notions where the construction of visual references is highlighted as a context that gives meaning to mathematical...
(2)The meaning of capital is B.A.首都B.省会C.资本(3) Ais the symbol of Hangzhou.A.West LakeB.Lingyin TempleC.Songcheng(4)Many Tourists can drink Cin Hangzhou.A.Hangzhou silkB.Dongpo meatC.Longjing tea(5)I BHangzhou very much after reading the text.A.don't likeB...
2. The backward management means Community safety follows the old pattern of man-to-man and man-to-man control, with backward management means, innumerable bases, unclear circumstances, scattered information and inadequate management. 3. Unable to control dynamically The flow of people in and out ...
provided that not more than three Ra-Rd groups have the same meaning and that X1 is not CCOOH or CCOO-alkyl; G = a protecting group; One of G1 and G2 is H and the other is H, alkyl, OH, alkoxy, aroyl, alkanoyl-OCH2, aroyl-OCH2 or COO-Rg or OCO-Rg; Rg = alkyl optionally...
and X1 having the meaning of CCOOH or CCOO-alkyl; G is an amine protective casing; and one of G1 and G2 represents a hydrogenator and the other hydrogens, alkyl, hydroxy, alkyloxy, aryl, alkanoyl-OCH2, aryl-OCH2 or COO-Rg or OCO-Rg; In the case of Rg, halogen, hydroxyl, alkyl...
provided that not more than three Ra-Rd groups have the same meaning and that X1 is not CCOOH or CCOO-alkyl; G = a protecting group; One of G1 and G2 is H and the other is H, alkyl, OH, alkoxy, aroyl, alkanoyl-OCH2, aroyl-OCH2 or COO-Rg or OCO-Rg; Rg = alkyl optionally...