蝙蝠和鸽子都能在空中飞翔。下列关于适应飞行特点的描述中,只适合鸽子的是 A.胸骨

题型:选择题

问题:

蝙蝠和鸽子都能在空中飞翔。下列关于适应飞行特点的描述中,只适合鸽子的是

A.胸骨发达

B.前、后肢连有翼膜,体表有毛

C.有尾

D.前肢变成翼,体表有羽毛

考点:探究实验:鸟适于飞行的特点动物的生活环境和生活习性动物的形态结构和功能
题型:选择题

原发性肾病综合征最易发生的并发症是下列哪项()

A.低纳血症

B.感染

C.高凝状态

D.低血容量休克

E.低钙血症

题型:选择题

糜烂和溃疡的不同点有()。

A.皮肤缺损的面积

B.皮肤缺损的深度

C.愈后是否形成瘢痕

D.表面是否继发感染

题型:选择题


阅读下面的文章,完成下列问题。
只要一半
“这么小的房子只给我两间”女军医李静忿忿地说。
她想,要是爸爸(确切地说是公公)还是这儿的政委,或者她在“老头儿”离休前就调到这儿来,他们怎么敢只给我这样两间破房子
营房助理员是个老实巴交的小伙子,李静想,这种人好对付,来点硬的就吓住了。
“我的要求也不过分,”她傲慢地仰起那张很漂亮的面孔,“把我爸爸过去的房子分给我一半就行啦”。
“那……”年轻的营房助理员抠抠头皮,指着那两间屋子问:“您要哪一间呢”
“什么意思”李静冷冷地盯着他。
“老政委过去住的就是这两间。”

这篇小说的最大特点是:

A.概括、凝练

B.幽默、犀利

C.典型、凝练

D.言简而意远

题型:选择题

Passage Two

Americans usually consider themselves a friendly people. Their friendships, however, tend to be shorter and more casual than friendships among people from other cultures. It is not uncommon for Americans to have only one close friend during their lifetime, and consider other "friends" to be just social acquaintances. This attitude probably has something to do with American mobility and the fact that Americans do not like to be dependent on other people. They tend to "compartmentalize" (划分) friendships, having "friends at work", "friends on the softball team", "family friends", etc.
Because the United States is a highly active society, full of movement and change, people always seem to be on the go. In this highly charged atmosphere, Americans can sometimes seem brusque (无礼的) or impatient. They want to get to know you as quickly as possible and then move on to something else. Sometimes, early on, they will ask you questions that you may feel are very personal. No insult is intended; the questions usually grow out of their genuine interest or curiosity, and their impatience to get to the heart of the matter. And the same goes for you. If you do not understand certain American behavior or you want to know more about them, do not hesitate to ask them questions about themselves. Americans are usually eager to explain all about their country or anything "American" in which you may be interested. So much so in fact that you may become tired of listening. It doesn’t matter, because Americans tend to be uncomfortable with silence during a conversation. They would rather talk about the weather or the latest sports scores, for example, than deal with silence.
On the other hand, don’t expect Americans to be knowledgeable about international geography or world affairs, unless those subjects directly involve the United States. Because the United States is not surrounded by other nations, some Americans tend to ignore the rest of the world.

Which of the following statements is NOT true according to the passage

A.Friendships among Americans tend to be casual.

B.Americans do not like to depend on other people.

C.Americans always seem to be on the go.

D.Americans know a lot about international affairs.

题型:选择题

药物在畜禽组织中的浓度高于血浆浓度是显示()

A、药时曲线下面积大

B、表观分布容积大

C、峰浓度高

D、生物利用度

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