在○里填上“+”“-”“×”或“÷”。 8○4=2 30○5=25 2○2= 4

下面是一位名人的话，他打比方教导一位颇有成就的青年人，让他打好基础，尽快出成果。请你把这位名人的话补充完整。

装在口袋里的杏核，永远是一只杏核。只有_____________________________ 才能 _____________                       。

Science has told us too much about the moon that it is fairly easy to imagine what it would be like to get there. It is certainly not a friendly place. Since there is no air or water, there can be no life of any kind. There is not much variety of scenery either. For mile after mile there are only flat plains of dust with mountains around them. Above, the sun and stars shine in the black sky. If you step out of the mountain shadow, it means moving from the severe cold into intense (强烈的) heat. These extreme temperatures continually break rocks away from the surface of the mountains. The moon is also a very silent world, for sound waves can only travel through air. But beyond the broken horizon, you see a friendly sight. Our earth is shining more brightly than the stars. From this distance, it looks like an immense (巨大的) blue, green and brown ball.

小题1:The moon is an unfriendly place because                   .

A．there is no air, no water, no life, no scenery

B．the sun and stars shine in the sky

C．temperature breaks rock away

D．all of the above小题2:Without           , the moon is a silent world.

A．man

B．air

C．sound

D．water小题3:According to the passage we know that             .

A．the earth looks like a colored ball

B．we can enjoy the scenery on the moon

C．every inch of the moon is very hot

D．the extreme temperature breaks rocks away from the surface of mountains小题4:We can conclude（断定） that “continually” means          .

A．sometimes

B．always

C．without break

D．frequently小题5:The best title for the passage is                        .

A．An Unfriendly and Friendly Place

B．The Geography of the Moon

C．Moon, a Silent World

D．The Moon

左心衰呼吸困难的形式有以下几种：（）

A.劳力性呼吸困难

B.端坐呼吸

C.阵发性夜间呼吸困难

D.吸气性呼吸困难

E.呼气性呼吸困难

700型由客舱进入前货舱的专用接近盖板在（）

A.从前数第10个窗户附近

B.机身左侧

C.从前数第13个窗户附近

D.从后数第8个窗户

按照钢管扣件脚手架立杆稳定性计算部位的确定要求，当脚手架的步距、纵距、横距和连墙件距有变化时，应进行计算和验算的部位有（）

A.计算脚手架顶层立杆段

B.计算脚手架底层立杆段

C.计算脚手架所有立杆段

D.验算出现最小步距、立杆纵距、立杆横距、连墙件间距等部位的立杆段

E.验算出现最大步距、立杆纵距、立杆横距、连墙件间距等部位的立杆段