当今精确指导武器的发展已经非常完备，先进的精确制导武器可以将对点的圆概率误差控制在（）米以内。
A、10
B、0.9
C、3
参考答案：B
根据句意及所给首字母填写单词。
1. "Come in and take a s________",Mary said to Tom.
2. Is Harbin in southern China or in n________ China?
3. -Who do you think is the best p________?'
-MeiLanfang,I think.
4. There is________rain in summer in the south. So the weather is always wet.
5. It is c________to stay inside near a fire(火)on such a cold day.
虚拟企业的主要特点包括（）。
A.企业组织界限模糊
B.扁平化的组织结构
C.学习型组织
D.动态联盟
