Exercise—It's good for you!

Playing sports，dancing and even touching your toes is exercise．Exercise builds a strong body．This helps you to do all the things you want to do．

⒈Exercise helps you to keep fit

Can you bend(弯腰)down and touch your toes? Can you stretch(伸展)up high? Exercise helps you to bend and stretch easily．

⒉Exercise makes you strong

Use your arms and legs often．Exercise builds strong muscles(肌肉)．

⒊Exercise makes you feel good

Running，jumping and playing with your friends is exercise．It makes you happy．

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下列有关硫铁矿制硫酸的说法中，正确的是(  )

2011年1月24日，俄罗斯首都莫斯科多莫杰多沃机场发生炸弹袭击事件，造成至少35人死亡，130多人受伤。事发后，国际社会对这一恐怖袭击行为纷纷表示谴责。这不能说明(    )

在图中根据小磁针静止时的指向，标出磁体的N、S极和A点的磁感线方向。