平键连接可分为（）。A、普通平键连接 B、导向平键连接 C、滑键连接 D、双键连接

阅读理解。

     Fish have started protecting us. It seems unlikely, but the Intelligent Automation Corporation has developed

a system that uses fish to protect our water supplies. Cities and towns share water with millions of people, so

it's important that the water is clean and safe to drink. Bluegills, which are small enough to fit in your hand, are

the fish that are protecting our water. They are common freshwater fish native to America and are also known

as bream or sunfish. According to the Associated Press, the bluegills were originally used by the Army to make

sure water was safe. Now San Francisco, New York City, Washington D.C and several other cities use the bluegill monitoring system. The bluegill system works by constantly filling the fish tank with city or town water. A

small group of bluegills swim in the local water and are closely monitored.

     Bluegills are very sensitive to their environment. Changes in the environment cause their behavior and

breathing patterns to change. They cough if the water is polluted. Fish cough by flexing their gills (鳃) to get

rid of unwanted particles, like grain of sand, from their breathing passages. If the bluegills are coughing the

computer sends an alarm via email.

     The bluegills in New York City discovered an diesel spill (柴油外溢) hours before the usual monitors.

Adding the bluegill system to regular water protection methods resulted in an early warning and safer water.

1. People use the bluegill system to monitor water supplies_____.

A. because they have high sensibility to their environment

B. because they are used to swimming in the fresh water

C. because they can cough by means of their gills

D. because they are able to send e-mails by computers

2. Which of the following statements about Bluegills is NOT true?

A. They are about the size of a human hand.

B. They are freshwater fish easily found in America.

C. They were used to safeguard water in the army.

D. They are smarter than any other living thing on earth.

3. People decide whether the water is polluted by means of _____.

A. information sent by the Army

B. the warning e-mail the computer sends

C. observing the activities of bluegills

D. constantly filling the fish tank with water

关于下列图示的说法中正确的是（　　）

A．用图①所示实验可比较硫、碳、硅三种元素的非金属性强弱

B．用图②所示实验装置排空气法收集CO₂气体

C．图③表示可逆反应CO（g）+H₂O（g）CO₂（g）+H₂（g）的△H大于0

D．图④两个装置中通过导线的电子数相同时，消耗负极材料的物质的量也相同

判断窒息最有力的依据是（）。

A.烦躁不安

B.呼吸急促

C.吸气时锁骨上、肋间隙、剑突下出现凹陷

D.出冷汗、脉速

E.鼻翼煽动

加油卡客户开具发票类型又分为（）。

A.定额发票

B.手写发票

C.增值税发票

D.普通发票

（）烟草行政部门应争取地方党委、政府的支持和相关执法部门的配合，建立统一协调、相互协作的联合执法长效机制，开展多种形式的烟草市场联合执法检查活动，因此，在联合执法检查活动中，烟草行政部门与其他执法部门相比，处于辅助者的地位。