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Name： Container Gardens by Number

Cover price： $l5.95

Our price： $9.49

A book covers 50 easy-to-follow container(容器)designs. Each design provides a simple numbered planting plan that shows exactly how to create each display， with an instruction of the finished container and in-depth plant information. The plans are easy to follow and for any type of living space or garden.

Name： Off the Beaten Path

Cover price： $30.00

Our price： $l9.80

The best-selling Reader's Digest travel book has 40% new content including over 200 new places of interest， over 200 new full-color photographs， and all-new， up-to-date maps. It introduces over l， 000 of the United States' most beautiful must-see sights.

Name： l80l Home Treatment

Cover price： $40.00

Our price： $29.96

Plenty of health problems can be solved at home. Each and every treatment will be tested by a doctor to make sure it is safe and sound.

Lots of conditions are covered， from headaches， sunburn and bad breath to hiccups(打嗝).

Name： Best Weekend Projects

Cover price： $l7.95

Our price： $l3.96

Choose from 80 ideas to create an unusual living space. The projects are practical， as well as attractive， and will improve your home and yard and can be made in a weekend. These 80 well-designed projects are presented in a clear， easy-to-follow style.

读图回答下列问题。

下列图示实验基本操作错误的是（　　）

巴西最大的城市和工业中心是____ ．20世纪90年代以来，美国的经济增长得益于 ____ 的蓬勃发展．

已知定义在实数集R上的函数$f\left(x\right)$满足$f\left(1\right)=1$，且$f\left(x\right)$的导数$f\left(x\right)$在R上恒有$f\left(x\right)<\frac{1}{2}\left(x\in R\right)$，则不等式$f\left(x^2\right)<\frac{x^2}{2}+\frac{1}{2}$的解集是（  ）