下列各项可引起腹部绞痛的是（）。 A.腹腔内出血 B.腹膜炎症病变 C.有管腔脏器的

我国政府与社会的关系也面临着根本性的调整。总的方向是建立在（）的政府与社会的关系模式。

A.大政府，大社会

B.小政府，小社会

C.大政府，小社会

D.小政府，大社会

(二)

Some spiders hunt on the ground, others build webs to trap their food, but the grass water spider catches its prey by running along the surface of the water.

This special water spider lives on the grassy banks of streams where mosquitoes, damsel flies and other insects come to feed and breed.

Although it is one of the largest spiders in New Zealand, it has an unusual ability. It doesn’t disturb the water as it waits for its meal, and there~ is barely a ripple when it skims across the surface at lightning speed to catch its prey.

Grass water spiders deal swiftly with larger insects like damsel flies by pulling their heads under the water and holding them there until they drown.

After a meal, the grass water spider spends up to half an hour grooming itself. It wipes its eight eyes, brushes its antennae, and takes special care to clean the hairs on its body.

It is the hairs that trap tiny bubbles of air so that the spider can run down a blade of grass and stay underwater for up to an hour when it is frightened. The hairs also keep the spider dry, even underwater.

It is only when the female spider is caring for the young that she does not hunt on the water. After mating, she produces a large egg sac, which she carries around for five weeks. Once the eggs start to hatch, she attaches the sac to some blades of grass or a thistle. She then tears the sac open and releases the tiny spiders into the nursery web.

How does the grass water spider kill its prey（）

A．In a web

B．By drowning

C．By poisoning

D．With its antennae

男性，33岁。近5年来反复出现上腹部疼痛，尤以饱餐后明显。今日突然出现右上腹剧痛，5小时后来院就诊。检查：T37．3℃，P100次/分，R16次/分，BPl20/80mmHg。腹平，腹式呼吸消失。全腹压痛、反跳痛，腹肌紧张明显。肝浊音界未叩出。肠鸣音弱。

对诊断最有价值的首选检查是（）

A.腹部B超

B.上消化道造影

C.肛门指诊

D.腹部X线平片

E.胃镜检查

F.腹部CT

呼吸作用的最重要意义在于（）.

A，呼出二氧化碳

B，为生命活动提供能量

C，消耗氧

D，分解有机物

正当理由是一般侵权民事责任的抗辩事由之一，包括

A．自助行为

B．不可抗力

C．意外事件

D．受害人过错