开展人民防空教育的重要意义有哪些？

汽车需求量（Q）随着汽车价格（P）、汽车购置税（T）、汽油价格（E）、居民收入（T）的变动而变动。下列曲线图中正确反映其变动关系的是[ ]

A．

B．

C．

D．

小青在计算小数减法时，错把减数20.2看成2.02，得到的差是32.6，正确的差应该是[ ]

A. 14.42               

B. 18.18              

C. 34.62          

D. 52.8

首字母填空

The worst traveler in the world was Paul of San Francisco. Once he(1) f____ from the U.S. to his hometown in Italy to see someone at home. The plane made a one hour stop to get oil at an airport in New York. Paul thought he was in Rome. (2)C____, he got off the plane.

When nobody was there to meet him, Paul thought maybe the heavy(3) t___ made his friends late. While looking for their address, Paul found many high (4)m___ buildings instead of old ones. He also found that many people spoke English but not Italian and that many street signs were (5)w_____ in English.

Paul knew very (6)l_____ English. So he asked a policeman in Italian the way to the bus station, He happened to meet a policeman who was also born in Italy and answered in the same (7)l____.

After twelve hours ‘ travelling round on a bus, the driver handed him over to (8)a_____ policeman. But this time, this policeman could only speak English. So Paul asked the policeman why the Rome police employed(雇佣) so many people who spoke English as policemen.

Paul didn’t (9)b____ he was in New York when he was told so. To get him on a plane to Italy, he was(10) s______ to the airport in a police car.

如图所示，是我国选手在第24届世界大学生冬运会女子冰壶比赛中夺冠的一个场景。比赛时两名队员在冰壶前方“刷冰”，通过_________ 的方式改变冰的内能，使表面的冰________ 成薄薄的一层水（填物态变化名称），这样就能够减小冰壶与冰面之间的___________ ，使冰壶按照运动员预计的运动快慢和方向运动。

精梳质量控制和节约用棉要注意含短绒率是指（）

A、小卷含短绒率

B、精梳条含短绒率

C、落棉含短绒率

D、生条含短绒率