“十三五”时期是全面建成小康社会决胜阶段，要实现“十三五”时期发展目标，必须牢固树立并切实贯彻创新、协调、绿色、开放、共享的发展理念。

结合材料回答下列问题：

下列划线字的注音全都正确的一项是（    ）

已知x>0,由不等式$x+\frac{1}{x}>2,x^2+\frac{2}{x}>3,x^3+\frac{3}{x}>4$可以推广为(    )

阅读下面两幅人口统计图，回答下列各题。

How to Pick the Perfect Family Tent

    People like camping. But to ensure everyone has a good time, choosing the right family tent is important. ____ Here's how to choose the perfect tent for your family.

    First of all, consider the size of the camps. Generally speaking, four-and-six-person tents are popular with families. ____ But a couple of features（特点）can make all the difference. For families with small children, a tent with a single entrance is a better choice. This makes it easier to keep track of who's coming and going. Of course, two doors can offer added more convenience.

    Some tents require two full-grown adults to set them up. ____ Be sure to take into account the setup and breakdown needs of any model you're considering. It may be necessary to go with a smaller model, or even two smaller tents, rather than one large tent for your family.

____ Or, if friends have a tent, see if you can borrow it for an overnight in your backyard. You'll quickly discover what you like and don't like.

    As an alternative, many outdoor shops have rental departments. Do your research to determine what style and size you think would work best, and find out if you can rent that model or one that's similar. Finally, if you are in a rush, ask if you can climb inside the tent at the store. ____

A. Getting in and out of the tent sounds basic.

B. To save money, you can make one on your own.

C. But you can turn to anyone for help when necessary.

D. It could be a problem if you're the only adult when camping.

E. Take the tent you are considering out for a “test drive” before you buy.

F. It's your home away from home, and the place where you'll sleep and relax.

G. This will give you a chance to assess all the features up close and in person.