2015年9月3日，我国抗日战争胜利70周年纪念日大阅兵，新武器、新装备、新方队、新面貌，以恢宏、磅礴之势，再度震惊世界，也见证了新中国的成长和人民军队发展壮大，中国军事力量不断发展壮大，一个重要原因是（    ）

“实业救国”思潮出现于(　)

    It's a fine day. The Black（布莱克一家）are busy today. Tony and Gogo are going to the beach. Jenny is going to the park with her friends. Mrs. Black is going to the shopping mall. She is going to buy some milk and vegetables. Is Mr. Black going to the shopping mall, too? No, he isn't. He's going to stay at home. Look! He is reading the newspapers（报纸）.

高度相同的三个实心铁块：圆柱体甲、正方体乙和长方体丙（如图所示）放在水平桌面上.已知正方体铁块最重，长方体铁块底面积最小.则三个铁块对桌面的压强（   ）