From CAI, multimedia to Web education, teaching English on Web (Internet) is challenging the traditional teaching model and becoming the major trend of teaching. This passage analyzes the characteristics and methods of teaching English on Web. At the same time, the writer gives some suggestions concerning this English teaching model.
By means of studies of synthesis technology of calcium peroxide this paper discusses the influence of reaction temperature, time, the concentration of hydrogen peroxide, the quantity of stabilizer, the quantity of ammonium chloride and the surfeit of calcium hydroxide. The H2O2 utilization ratio in the synthetic technology of calcium is also discussed.
This paper studies major genes of body weight, height at withers, body length, heart girth, width of chest, deepness of chest and cannon circumference on Jintang black goat. The results show body weight, height at withers, body length, heart girth, deepness of chest have effects and roles of major genes.
This paper mainly proves the following: (1) Let -paracompact. X isnormal weak (?)-refinable if Xσ is normal weak (?) -refinable for every . (2) Let is countable paracompact, then the following are equivalent: X is normal weak Xσ is normal weak (?)-refinable; Xi is normal weak (?) -refinable.
The purpose of the present paper is to extend the loop-technique of the stepping-stone algorithm to the generalized transportation problem. The main result (Theorem and Corollary of §6) is, that passing from a basic feasible solution to another one may always be carried out by constructing a simple symmetrical or a double loop (as defined in §2) and computing new values for the variables only along this path. The amount of computations needed for this turns out to be substantially reduced as compared to the usual way of solving the system of equations relating the new basis to the old one.
