进行弹性体改性沥青防水卷材拉力及延伸率试验的仪器设备,应有连续记录力和对应距离的装置

题型:单项选择题

问题:

进行弹性体改性沥青防水卷材拉力及延伸率试验的仪器设备,应有连续记录力和对应距离的装置,移动夹具能够按()mm/min的速度均速移动。

A.50±10

B.100±10

C.150±10

D.200±10

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题型:单项选择题

Dear Emma,

Thanks for sending me the photo of your room. Here is a photo of my room.

Look! A bed, a desk, a chair and a bookcase are in my room. My bed is blue and it is near the window(在窗户附近). My desk is near the bed and it’s black. My books and computer are on it. An English dictionary is on the bookcase. Where is my pencil box? It is in the desk. My two pens and three rulers are in the pencil box. My school bag is on the chair. My brother’s white baseball is under my bed. And you can see a dog in the photo. Its name is Sam.

My room is tidy, isn’t?

Yours,

Jack

根据材料内容选择最佳答案。

小题1:Jack’s desk is       .

A.red

B.black

C.blue

D.white小题2:划线单词“it”指的是 “       “。

A.the bed

B.the desk

C.the chair

D.the bookcase小题3:On the bookcase is        .

A.a Chinese dictionary

B.an English book

C.an English dictionary

D.a Chinese book小题4:Jack’s pencil box is        .

A.on his bed

B.on his desk

C.under his bed

D.in his desk小题5:下列哪项陈述是正确的?

A.Sam is Jack’s brother.

B.An eraser is in the pencil box.

C.Jack has a photo of Emma’s room.

D.Jack’s brother doesn’t have a baseball.

题型:单项选择题

(12分)如图17所示,质量为m=5×10-8 kg的带电粒子以v0=2 m/s的速度从水平放置的平行金属板A、B中央飞入电场,已知板长L=10 cm,板间距离d=2 cm,当A、B间加电压UAB=103 V时,带电粒子恰好沿直线穿过电场(设此时A板电势高).求:

(1)带电粒子的电性和所带电荷量;                              

(2)A、B间所加电压在什么范围内带电粒子能从板间飞出?

题型:单项选择题

解放思想、实事求是是思想路线,是建设有中国特色社会主义的首要问题。 ( )

题型:单项选择题

附着丧失可以表示()。

A.牙周炎炎症程度

B.牙龈炎炎症程度

C.牙槽骨吸收程度

D.牙周组织破坏程度

E.牙周炎的诊断指标

题型:单项选择题

城市中()制可以减少外部效应。

A.公害分区

B.财政分区

C.设计分区

D.功能分区

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