晚清厦门胡里山炮台的兴建是“师夷长技以自强”的一次尝试，这次尝试是（    ）

孟德尔运用“假说﹣演绎”法研究豌豆一对相对性状的杂交实验，发现了分离定律，下列那一项属于其研究过程中的“演绎”（　　）

   Many students know what they want to be in the future* . We think boys are different from girls. Here is a survey in Green High School. Let's look at the diagram* .