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Dans quelle type de construction est il intéressant d'utiliser la solution dalle alvéolaire

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A sudden sharp increase in the demand for the German mark almost destroyed the Exchange Rate Mechanism in 1992. Which of the following does not help explain how a rise in the demand for a currency can jeopardize a target zone or exchange rate​ band?A.Some countries may decide that the cost of staying in the target zone is too great and decide to leave.B.Buying up additional marks and reducing interest rates create extra demand for the currency that is falling in value.C.An increase in the value of the mark is equivalent to a decrease in the value of the other currencies. The fall in value suffered by currencies pushed them out of the range of values they were obliged to maintain against the mark.D.Additional domestic problems are created if either the reserves of foreign currency that are being used to buy up the domestic currency runs​ out, or if the increase in interest rates is harmful to the domestic economy.

Which muckraker was believed the be the first investigative journalist, and used their skills to expose the dirty tactics of Rockefeller's Standard Oil Company?

Scientists are studying the structure and function of Receptor X, a single-polypeptide protein that is found in the membrane around certain types of cells. Receptor X contains no alpha-helices or beta sheets. A specific molecule outside the cells is recognized and bound by Receptor X. The binding of the molecule to Receptor X causes the cells to have a particular response.To study the structure and function of Receptor X, the scientists are altering the sequence of small sections of the receptor. Both the normal sequence of a five‑amino acid section of Receptor X and an altered sequence that contains two amino acid substitutions are shown in Figure 1.(a) Identify the process used to form the covalent peptide bonds that join amino acids into a polypeptide.(b) The change in the amino acid sequence illustrated in Figure 1 caused a change in the shape of Receptor X. Based on the R groups of the original and substituted amino acids, explain why Receptor X changed shape.(c) Using the template below that represents the four levels of protein structure, place an X on each level that is expected to be altered as a result of the amino acid substitutions shown in Figure 1.d) Explain how the amino acid substitution shown in Figure 1 is most likely to affect the function of Receptor X.

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