2010年3月17日，北京电视台报道：一群穿着校服的初中生，在地铁通道里“卖唱”，并且还打出两个口号“我们是90后！”、“我们不是啃老族！”这些初中生的行为（  ）

①有助于培养自立自强的精神           ②表明他们独立意识增强 

③有助于磨砺坚强的意志品质           ④没有实质意义

不等式组$\left\{\begin{array}{c}2x+1>-1\\ 2x+1<3\end{array}\right.$的解集是____ .

如图为种子发育过程和种子萌发过程中内源激素、种子含水量以及营养物质积累量的变化，据图分析，在种子发育过程中有关植物激素的作用错误的是（　　）

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    Tom and Tim are brothers. They are 1 Australia. They live in a mountain village. Tom is 104 years old and Tim is 102 years old now. They 2 their story in a book called Enjoy Our Life.

    Here is some of their advice(建议) for living a long, 3 life.

    ★Get up 4. They get up 5 6:30 or 7:00 in the morning.

    ★Have a 6 breakfast. The brothers eat oatmeal(燕麦粥), half a banana,  7 and eggs with a little cheese(奶酪).

    ★8 every day. The brothers like 9 mountains. They also walk on the hills(小山) every day.

    ★Eat a lot of 10, especially(尤其) garlic(大蒜). Garlic is good 11 your health.

    ★Don't eat a lot of salt(盐) and fat. These things are 12 for your body(身体).

    ★Don't listen 13 the doctors always. Most of the doctors don't know what to do with us. When there is 14 wrong with us, they don't know how to treat(治疗) us. They are always surprised(吃惊) to see us live so 15.