[单项选择]不易淬火钢热影响区综合力学性能最好的区域是（）。
A. 熔合区
B. 过热区
C. 正火区

{{B}} Don’t Destroy the Essential Catalyst of Risk{{/B}}
Since the spring, and most acutely this autumn, a global contagion (传染)of fear and panic has choked off the arteries of finance, compounding a broader deterioration in the global economy.
Financial institutions have an obligation to the broader financial system. We depend on a healthy, well-functioning system but we failed to raise enough questions about whether some of the trends and practices that had become commonplace really served the public’s long-term interests.
{{B}}Seven important lessons{{/B}}
As policymakers and regulators begin to consider the regulatory actions to be taken to address the fallings, I believe it is useful to reflect on some of the lessons from tiffs crisis.
The first is that risk management should not be entirely predicated on historical data. In the past several months, we have heard the phrase" mu
A. various basket indices and credit default swaps
B. hedge fund and forward rate agreements
C. credit-linked notes
D. current swaps and rates swaps