齐桓公和晋文公治理国家的相同因素不包括 [ ] A．改革内政 B．发展生产 C．

阅读短文，选择正确答案。

      Children in the USA like K Day very much. K is for kite. March 7 is the day. On that day, lots of children

go out in the open air. They take their kites with them. Some kites are very big. Others are small. They are in

different colours. Every kite has a long string (绳). To get the kites up, the children begin to run. They let out

the string from the ball in their hands. Now the kites are flying in the air. How nice they look!

      Now all of the kites are high up in the air. Some are higher than (比) others. The one like a bird is the

highest (最高). But what's wrong? It's flying away! The string is broken.

      Another kite gets away. And more kites fly. But the children are running after them. They want to get them

back. People are watching them and laughing.

1. K is for ________. [ ]

A. kind

B. kilometer

C. kites

D. knife

2. K Day is on _______. [ ]

A. May 7

B. March 7

C. April 7

D. April 1

3. To get his kite up, a child must ______. [ ]

A. run and run

B. walk and let out the string from the ball in his hand

C. walk and walk

D. run and let out the string from the ball in his hand

4. The kite like a bird is _______ of all. [ ]

A. high

B. higher

C. the highest

D. tall

5. The string of the kite like a bird is ______. [ ]

A. long

B. short

C. broken

D. very good

给你一只标有“10Ω  0.3A”的定值电阻和一只标有“30 Ω   0.6A”的滑动变阻器，在保证所有电路元件安全的前提下，若将它们串联接入电路，则电路中允许通过的最大电流为_____A；若将它们并联接入电路，则干路中允许通过的最大电流为_____A，这时滑动变阻器的阻值为     Ω，电路的总功率为     W．

汽车上所有用电设备的电流必须通过电流表。

联合国气候变化大会于2009年12月7日～18日在丹麦首都哥本哈根召开，焦点议题之一是发展“低碳经济”，减少温室气体排放．你认为下列做法中．不能有效减少空气中CO₂含量的是（　　）

A．开发利用太阳能、风能、生物能、海洋能等清洁能源

B．使用节能产品，推广节能环保汽车

C．植树造林，增加森林植被面积

D．用脱硫处理的煤代替原煤作燃料

医疗机构制剂批准文号的格式为：X药制字H(Z)+4位年号+4位流水号，各字母的含义：Z为( )

A．省、自治区、直辖市简称
B．化学制剂
C．中药制剂
D．中成药
E．西药制剂