已知C2n+1-C2n=C3n，则n的值为______．

We often hear that children wish they were grown-ups, and that old people wish they were young. __小题1:__ The happiest people enjoy what each age gives them without wasting their time in useless regrets.

__小题2:__ A child is fed, looked after and loved by all grown-ups like parents or grandparents. __小题3:__ However, for older people they often lose their interest in those things.

On the other hand, a child may also have some pains with him. __小题4:__ He is often told not to do something. He will certainly be shouted at for doing something wrong.

When a child grows up, he can no longer expect others to pay for his food, clothes and many other things. __小题5:__ If he still spends most of his time playing as he used to in childhood, he will go hungry. If, however, he works hard and has no trouble, he can build up his own position in society with great happiness.

A．What’s more, life is always giving new things to him.

B．He enjoys his life very much.

C．And if he wants to live comfortably, he has to work.

D．He is not so free to do what he wishes to do.E.       Life is always sad for old people.

F.       Each age has its own pleasures and its own pains.

Childhood is a time when there are few duties.

善补肺阴的药物是（）

A.西洋参、山药

B.沙参、玉竹

C.麦冬、天冬

D.石斛、白术

E.百合、黄精

人们往往根据自己过去获得的知识和经验去理解和感知现实的对象，这是人知觉的（）性。

A.选择性

B.整体性

C.理解性

D.恒常性

形状公差有直线度、平面度、圆度、圆柱度、线轮廓度和面轮廓度。（）

Turkey’s Bodrum peninsula is different. The tourist boom in this part of the world (1) turned some small villages into resorts yet left neighbouring beaches undisturbed, making it quite (2) southern France or the Spanish Coasts where few stretches of coastline are undevelopeD．
The (3) for this happy set of circumstances is simple. For thousands of years, travel here (4) easier by boat than by lanD．So when mass tourism arrived in the (5) 1980s, there was no coast road for ribbon development to follow. So the peninsula, just (6) hour from Bodrum airport, has not become one long littoral of resort.
The building (7) new hotels has mainly been confined to places easily reached by then relatively (8) roads. Such ease of access has made Gumbet, near Bodrum, a busy resort, while the little fishing village of Gumusluk, 12 miles further west and only recently reachable by (9) , remains tranquil and undisturbeD．
It’s worth thinking carefully about location when planning a family (10) on the peninsulA．Choose a place that is centrally located, preferably out of earshot (11) Bodrum town’s "lively"—which means nosy—nightlife, and you can then use (12) area’s comfortably small scale to your advantage. Today’s new roads mean most places can (13) reached in under an hour by taxi or the ubiquitous dolmus-minibus.
The (14) of facilities at the Tamarisk Beach Hotel near the small village of Ortakent makes (15) a good base. The family-run hotel—rooms and suites are in two-storey buildings (16) by palm trees and flowers in terracotta pots—sits above its own sandy (17) beach, shaded by tamarisk trees and sheltered by nearby islands.
The hotel is (18) child-friendly, too. Children, from infants up to young teenagers, can take part in a (19) of games and activities that include tuition in windsurfing, dinghy (20) catamaran sailing.