直翅目、半翅目、同翅目、鞘翅目、膜翅目、鳞翅目和双翅目成虫的简要特征是什么？

患者男，30岁。因持续高热，咽喉疼痛伴牙龈出血1周入院。体检：体温40℃，面色苍白，咽部明显充血，黏膜溃烂，全身皮肤见散在出血点，淋巴结未扪及，肝脾不肿大，胸骨无压痛。化验：RBC1．5×10¹²／L，Hb46g／L，WBC2．4×10⁹／L，N0．20（20％），L0．75（75％），M0．05（5％），血小板19×10⁹／L，网织红细胞0．001（0．1％）。

目前对患者威胁最大的并发症是（）

A.贫血性心脏病

B.脓毒血症

C.消化道出血

D.高热惊厥

E.弥散性血管内凝血

Construction workers in Southern California have made a wild discovery. They were digging at a building site in San Timoteo Canyon (峡谷) when they unearthed hundreds of ancient animal fossils. Researchers say the bones hold important clues about the history of the region.

Nearly 1, 500 fossils were recovered from the dusty canyon. The remains are about 1.4 million years old. They include the bones of a new species of deer, several small rodents (啮齿目动物) and more. A giant cat fossil was also found. Scientists believe the animal was an ancestor of the saber- toothed tiger. Signs of plant life were uncovered as well.

“This is a huge find,” says Rick Greenwood, a scientist studying the site. “I don’t think most people had any idea that those types of animals were wandering around here more than a million years ago.”

San Timoteo Canyon is located about 85 miles from Los Angeles. The area of the canyon where the fossils were found was once part of a green river valley. Today, the region is dry and plant life is rare.

Most of the fossils are well preserved. Experts say a muddy lake bed may have trapped thirty animals that wandered over for a drink. The mud helped to protect the animal fossils.

The remains are a million years older than those discovered at the famous La Brea Tar Pits in Los Angeles. Scientists studying the bones will be able to learn more about how the animals adapted to changes in the environment.

“We have a confused view of what this time period was like, ” says another scientist. “A discovery like this could really be an important contribution.”

About 35 different animal species are represented in the fossil collection. Scientists began removing bones from the site last fall. The project was completed this summer. Starting next year, the fossils will be on display at the Western Science Center in the nearby city of Hemet, California.

小题1:

What does the passage mainly focus on?

A．The secret of ancient animals’ deaths.

B．The preparation for a future fossil exhibition.

C．A great discovery of fossils.

D．The history of San Timoteo Canyon.小题2:

From what Rick says, we know ________. (原创)

A．fossils were discovered in the canyon for the first time.

B．the canyon in ancient times was quite different.

C．more research work will be carried on in the canyon.

D．the river water helped to protect the animal fossils.小题3:

Compared to the discovery at the La Brea Tar Pits, the canyon-involved fossils _______.

A．are far older

B．include more species

C．are better preserved

D．make experts more confused小题4:

What do we know about the fossils from the passage?

A．All of them are of new species.

B．Some of them have been destroyed

C．They were looked for under experts’ guidance.

D．They will be on show in the near future.

宴会前服务员要做到“八知”。其中之一是（）。

A.知客人的饮食习惯

B.知宾主身份

C.知客人口味爱好

D.知进住日期

下列哪项不是临床死亡期的特征

A．呼吸停止
B．心跳停止
C．各种反射消失
D．延髓处于深度抑制状态
E．组织细胞新陈代谢停止

血液中的钙有43%～47%的钙与蛋白质结合，其中最主要与哪种蛋白质结合（）

A.白蛋白

B.免疫球蛋白

C.转铁蛋白

D.钙调蛋白

E.C-反应蛋白