一塑料块，放入水中静止时，有45的体积没入水中，放入另一种液体中静止时，有34的

发布时间：2017-07-04 07:20 │ 来源：www.tikuol.com

题型：选择题

问题：

一塑料块，放入水中静止时，有

的体积没入水中，放入另一种液体中静止时，有

的体积没入液体中，则另一种液体的密度为（　　）

A．

ρ_水

B．

ρ_水

C．

ρ_水

D．

16ρ_水

考点：浮力及阿基米德原理物体的浮沉条件及其应用

题型：选择题

已知集合P={4，5，6}，Q={1，2，3}，定义P⊕Q={x|x=p-q，p∈P，q∈Q}，则集合P⊕Q的所有真子集的个数为（　　）

A．32

B．31

C．30

D．以上都不对

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题型：选择题

完形填空。

                                                                 No More Time Out
    Shawn and Thomas had always been good friends. They lived near each other, and they both loved   1  .
They played baseball, touch football, and kickball. They   2 liked to play soccer, shoot baskets, and
skateboard.
     When they were in the fourth grade, though, Thomas broke his   3   in a soccer game. He had to be on
crutches for six weeks.
     Shawn   4   Thomas, but what was there to do? Shawn didn't like television or computer games. Thomas
didn't like to sit and talk. After trying three times to start a conversation, Shawn   5   up. He said, "I'm out of
here."
     For days, Shawn   6 at home, feeling guilty for not visiting Thomas again. Thomas stayed home, too,
feeling   7   because Shawn wasn't visiting him. After a week, Shawn's mom spoke up. "It's time for you and
Thomas to get back into   8  ! That's why I spoke to Ms McNulty at the library. She has the perfect volunteer
job for you both," she said.
     Shawn said nothing.
     His morn continued, "The library sells used books to raise money. People are always   9   off books in bags
and boxes. Someone has to carry the books to the storage room. Someone has to   10   them into fiction (小说)
and nonfiction. You and Thomas can be a team again."
     "No, we  11 !" said Shawn. "He and I don't want a job." However, Shawn's mom wouldn't  12  no for an
answer.
     Sure enough,  13  the boys began, things changed. Shawn felt strong as he carried bags and boxes through
the library. Sorting books in the storage room, Thomas felt  14  again. In fact, one day Thomas said, "Between
you and me, Shawn, this isn't so  15 ." Shawn smiled and agreed. They were a good team.

( )1.A. books
( )2.A. also
( )3.A. arm
( )4.A. phoned
( )5.A. gave
( )6.A. talked
( )7.A. tired
( )8.A. effort
( )9.A. dropping
( )10.A. pack
( )11.A. mustn't
( )12.A. choose
( )13.A. because
( )14.A. relaxed
( )15.A. hard

B. sports
B. only
B. hand
B. invited
B. cheered
B. stayed
B. afraid
B. duty
B. bringing
B. lead
B. can't
B. keep
B. once
B. lucky
B. fair

C. movies
C. perhaps
C. nose
C. visited
C. turned
C. called
C. weak
C. choice
C. showing
C. sort
C. mightn't
C. take
C. if
C. useful
C. simple

D. arts
D. soon
D. leg
D. checked
D. hurried
D. waited
D. angry
D. action
D. knocking
D. turn
D. shouldn't
D. allow
D. although
D. special
D. bad

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题型：选择题

扫描仪的使用前需要完成的准备工作是（）。

A.与电脑连接

B.接通扫描仪的电源

C.安装扫描仪的驱动软件

D.与电脑连接、接通扫描仪的电源并安装好扫描仪的驱动软件

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题型：选择题

初始地籍调查工作由当地政府组织开展，责成调查辖区内各级国土资源行政主管部门成立相应的工作机构，负责本辖区内初始地籍调查工作的实施，组织调查队伍，对辖区内的初始地籍调查工作进行（）。

A.变更调查

B.分项处理

C.技术指导

D.组织协调

E.检查验收

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题型：选择题

A/P和人工操纵都是通过对什么的控制来使舵面移动（）。

A.PCU

B.A/P作动器

C.作动器

D.伺服器

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