现代农业集群化的模式主要有哪些？
参考答案：
现代农业集群化的模式主要有：农业高科技园模式、龙头企业带动型模式、专业市场带动型模式。
某研究得出某因素与疾病的联系0R=1.1，95％可信区间为0.7～1.5，这意味着（）。
A.总体OR值95％的可能是错误的
B.总体OR值在0.7～1.5的机会为95％
C.总体OR值说明该因素与疾病无关，而95％区间说明有联系
D.存在偏倚的可能性为95％
E.OR值正负联系均存在
A: What are you and Joe doing this weekend, Michelle Would you be free to come over for drinks after dinner sometimeB: ().
A. No, no. I think you and Mike should come over for dinner.
B. Hey, thank you, Pat. That sounds nice. I don’t think we have made any plans yet.
C. It’s hard to decide now.
D. We are doing nothing this weekend. What about you
