在科技部大力指导与支持下,江苏省认真落实国家创新部署,深入实施创新驱动发展战略,全面加快科技改革和创新发展,创新型省份建设跃上新台阶。进一步增强我省的科技创新能力( )
①必须坚定地实施科教兴国和人才强国战略 ②是我国民族振兴和社会进步的基石
③必须坚持把科技摆在优先发展的战略地位 ④青少年学生应自觉培养创新的精神
A:①②④
B:①③④
C:①④
D:②③
如图,一艘海轮位于灯塔P的北偏东30°方向,距离灯塔80海里的A处,它沿正南方向航行一段时间后,到达位于灯塔P的南偏东45°方向上的B处,这时,海轮所在的B处与灯塔P的距离为( )
对溺水者先要清除他口鼻内的污物,再进行人工呼吸.这样可以( )
It is Saturday morning. The sky is blue. My father and I are going to the park. There are a lot of people in the park. Some children are running on the grass. A dog is running after them. Some men are sitting on the grass. They are talking. Two girls are flying a nice kite. Three women are standing under a tree, and they are watching the children playing. There is a boat in the lake and two women are boating. Everyone in the park is very happy.
如图,已知A,B,C,D是同一直线上的四点,看图填空:AC=____+BC,BD=AD﹣____,AC<____.
---I think he will come if he ______ free tomorrow.