搜题请搜索小程序“爱下问搜题”
问题 单项选择题 B1型题

牙本质受到损伤刺激时，牙本质小管内的成牙本质细胞突变性，矿物盐沉积而封闭牙本质小管，这样的牙本质为（）。

A.前期牙本质

B.继发性牙本质

C.球间牙本质

D.透明牙本质

E.髓周牙本质

答案

参考答案：D

选择题

在长征途中，哪一事件扭转了红军被动挨打的局面，确立了党中央的正确领导，成为党的历史上生死攸关的转折点[ ]

A．遵义会议

B．四渡赤水河

C．巧渡金沙江

D．会宁大会师
查看答案
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.
查看答案