在下列两种钢中，哪一个前者为低合金钢，后者为高合金钢（）。

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问题单项选择题

A.Q235和18MnMoNBR

B.20R和8MnMoNBR；

C.18MnMoNBR和0Cr19Ni9

D.0Cr19Ni和18MnMoNBR

答案

参考答案：C

填空题

Washington: The Bush administration has ______ for the first time that it may be willing to ______ a multinational force in Iraq to operate under the ______ of the United Nations as long as ______ by an American. The idea was described by Richard L.Armitage, the deputy secretary of state, as just"______" in discussions at the United Nations. It was first ______ publicly last week by Kofi Annan, the United Nations’ secretary general. Mr. Armitage’s remarks, made ______ to regional reporters and released by ______ today, represent ______ in course for the administration, which has until now insisted that all ______ matters in Iraq remain under total American control. Allowing the United Nations ______ would be intended to win the support of the Security Council for ______ authorizing the occupation of the country. In his remarks, Mr. Armitage ______ to discuss the plans ______, saying, "I don’t think it helps to ______ publicly fight now." But he described the arrangement under consideration as "a multinational force ______ "in which "the American would be the U.N. commander." On Monday, Defense Secretary Donald H. Rumsfeld was asked whether he could ______ American troops fighting ______ . His answer: "I think that’s not going to happen." But he went on to rule out only ______ meaning by the United Nations, whose troops wear blue helmets over a peacekeeping force in Iraq.

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单项选择题

KDON10000/10000Nm³/h中D表示（）

A.高压

B.低压

C.中压

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