下列说法正确的是( ) A.单项式是整式,整式也是单项式 B.25与x5是同类项 C.

题型:选择题

问题:

下列说法正确的是(  )
A.单项式是整式,整式也是单项式
B.25与x5是同类项
C.单项式
1
2
πx3y
的系数是
1
2
π
,次数是4
D.
1
x
+2
是一次二项式
考点:整式的定义
题型:选择题

在进行实验研究时,为了增强实验的说服力,一般还应同时设计(  )

A.分组实验

B.重复实验

C.独立实验

D.对照实验

题型:选择题

两个相同的鱼缸注满水,在其中一个中放入一个模型小船,然后把两个鱼缸分别放在调好的天平上,如图所示,则天平        平衡(填“能”或“不能”)。

题型:选择题

You want to have fun and adventure and so you decide to travel somewhere to do it. Sounds like a simple enough thing. And basically it is. But what is adventure? That is the key here and the answer can be different for different people.

For those who love sports, adventure travel can have a whole different meaning than for those who like history. The physical travel types that you can find include such adventure travel as white water rafting (白浪漂流), kayaking or climbing and hiking to some mountains somewhere. To the hiker, backpacking across Ireland might be their adventure. For this type of person, adventure travel almost always includes something physical. Often the goal is to push their body’s limits and test their individual endurance (耐力).

For those who less want to climb mountains, adventure travel might mean traveling to Nepal and taking in the local festivals. Wine tasting in Italy is also vacation adventure for the more relaxed traveler who enjoys peace and comfort. Anything that is opposite to the normal scope (范围) of the traveler’s lifestyle defines (定义) adventure.

Adventure travel is not necessarily a one-size-fits-all type of vacation. Adventure depends on the person’s physical limits, how much money the person has and what the person enjoys doing. Going beyond the normal is adventurous for many. If your life is quite busy, then sitting on a beach in the moonlight with your family might be adventure for you. The point is not what you do but that you have a good time and that it is an adventure for YOU — not for the person next to you.

Do not sit home this year when vacation time rolls around. Go beyond your normal routine and try something new. If you usually spend your vacation sun-bathing on a beach, try hiking, instead, through the mountains. Look around you, think beyond your comfort zone and head out on an adventure vacation.

小题1:For a quiet traveler, he is most likely to choose _________.

A.backpacking across a country

B.wine tasting in a bar

C.hiking to some mountains

D.white water rafting小题2:To have an adventure travel, the most important is _________.

A.whether you enjoy yourself

B.whether you try something dangerous

C.where you go for the traveling

D.what you do in the traveling小题3:The underlined word “beyond” in Paragraph 4 probably means “_________”.

A.according to

B.later than

C.more than

D.less than小题4:From the passage, we can make a conclusion that _________.

A.adventure travel always includes something dangerous

B.adventure travel will cost you a large sum of money

C.anything that goes beyond the normal is adventure travel

D.adventure travelers like to do things to the limits of their body小题5:The best title for the passage may be “_________”.

A.Tips on adventure travel

B.Who is interested in adventure travel

C.What is adventure travel

D.Popular places for adventure travel

题型:选择题

与艾滋病最密切相关的牙周组织疾病是()

A.线性牙龈红斑

B.牙龈退缩

C.牙周一牙髓联合病变

D.根分叉病变

E.牙龈增生

题型:选择题

食管癌的转移主要是:()

A.血行转移

B.胸膜转移

C.肝脏转移

D.淋巴结转移

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