湿热带型低压交流电机一般用有溶剂绝缘浸渍漆浸3次。 ( )

最常见、最基本的创新形式是（）。

A.产品创新

B.引进、消化吸收再创新

C.原始创新

D.集成创新

A boy was going to study at the best school in town. In the morning, his grandfather took him to the school. When they went into the playground, the children came up.

“What a funny old man,” the boy said, making a face.

“Hey, fatty（胖子）,”another one shouted.

The children jeered at the pair（对，双） and jumped up and down.

Without saying a word, the old man took his grandson（外孙） out of the school gate.

“Wonderful! I don’t have to go to school!” the boy said.

“You do, but not this one,” his grandfather said. “I’ll find you another school to go to.” Grandfather took his grandson back to his house, asked Grandmother to look after him, and then went out to look for a school alone.

Every time he got to a school, the old man went into the playground, and waited for the children to come out at break time. In some schools the children completely ignored（不理会）the old man, and in others, they made fun of him. When this happened, he would turn sadly and leave. Finally, he went into the very small playground of a very small school, and stood tiredly against the wall. The bell rang, and the children came out into the playground.

“Sir, are you all right? Shall I bring you something to drink?” said a voice.

“We’ve got a bench(长凳) in the playground. Come and sit down,” came another voice.

Soon a young teacher came out into the playground. The old man greeted him and said, “Finally, I’ve found my grandson the best school in town.”

小题1:The underlined part “jeered at” in the passage probably means“     ”.

A．listened to

B．laughed at

C．cheered up

D．fought against小题2:How did the grandson feel when his grandfather took him out of the school gate of the first school?

A．Worried.

B．Happy.

C．Calm.

D．Afraid.小题3:The old man went into the       whenever he got to a school.

A．teacher’ office

B．classroom

C．school library

D．playground小题4:When the old man was in the very small school, the children there       him.

A．shouted at

B．made fun of

C．cared about

D．paid no attention to小题5:According to the old man,the best school should have the best      .

A．students

B．teachers

C．library

D．playground

成人型多囊肾的诊断中哪一项是不必要的（）

A.CT检查对诊断更加准确

B.B超筛查可与患者发病前发现

C.详细询问家族史

D.多囊肝的发现是诊断的重要依据

E.肾动脉造影对诊断具有重要意义

我只有一个包和一个照相机，______就什么也没有了。

A．而且

B．并且

C．除非

D．此外

采用集中质调节的热水供暖系统，运行时循环水泵A流量G₁=450t/h，扬程H₁=30m，水泵轴功率N₁=54kw。为减少运行电耗，现改为分阶段改变流量的质调节，选用两台水泵分阶段运行，两个阶段的相对流量比分别为φ₁=1、φ₂=0.8。室外气温t_w≤-19℃时采用原有水泵A，气温t_w＞-19℃时启用较小水泵B，则较小水泵的流量和扬程分别为( )。

A．G₂=480t/h，H₂=25m
B．G₂=360t/h，H₂=19.2m
C．G₂=360t/h，H₂=25m
D．G₂=480t/h，H₂=18.8m