A:
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1890年由张之洞创办的汉阳铁厂,是中国近代最早的官办制铁企业,产品不仅畅销国内,而且还出口到日本、美国、泰国等地,被西方人视为“中国觉醒”的标志。“中国觉醒”的主要含义应是( )
如图所示,宇航员站在某质量分布均匀的星球表面一斜坡上P点沿水平方向以初速度v0抛出一个小球,测得小球经时间t落到斜坡上另一点Q,斜面的倾角为α,已知该星球半径为R,万有引力常量为G,求:
下列对文章的理解,正确的两项是( )
In America, there are chores(杂活) for children of different ages. American people think that it's important to tell children their duty in the family.
Ages 4-6
Ages 6-12
Ages 13 and Up
-Make their bed;
-Clear dishes from the table;
-Set the table;
-Get the mail from the mailbox;
-Take care of pets;
-Cook simple food;
-Help wash the car;
-Vacuum(吸尘) and sweep;
-Take out the rubbish.
-Wash windows;
-Clean out fridge;
-Prepare a meal;
-Make shopping lists;
-Mow the lawn(剪草坪)