对于实数a,b，先定义一种新运算 “★”如下： a★b=若2★m=36，则实数m

发布时间：2017-06-02 14:12 │ 来源：www.tikuol.com

题型：选择题

问题：

对于实数a,b，先定义一种新运算 “★”如下： a★b= 若2★m=36，则实数m等于（）

A．8.5

B．4

C．4或—4.5

D．4或—4.5或 8.5

考点：代数式的概念整式的定义整式的加减整式的除法

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接触法制硫酸工艺中，其主反应在450℃并有催化剂存在下进行：

（1）该反应所用的催化剂是_______（填写化合物名称），该反应450℃时的平衡常数______500℃时的平衡常数（填“大于”、“小于”或“等于”）。

（2）该热化学反应方程式的意义是________________。

（3）下列描述中能说明上述反应已达平衡的是____.

a．v(O₂)正=2v(SO₃)逆

b．容器中气体的平均分子量不随时间而变化

c．容器中气体的密度不随时间而变化

d．容器中气体的分子总数不随时间而变化

（4）在一个固定容积为5L的密闭容器中充人0.20 mol SO₂和0.10 mol O₂，半分钟后达到平衡，测得容器中含SO₃0.18 mol，则v(O₂)=___mo1·L^-1·min^-1 ；若继续通入0.20mol SO₂和0.10 mol O₂,则平衡____移动（填“向正反应方向”、“向逆反应方向”或“不”），再次达到平衡后，___mol< n(SO₃)<__mol。

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临床最常见的肠梗阻类型是（）

A.蛔虫性肠梗阻

B.肠套叠

C.肠扭转

D.肠系膜血管栓塞引起的肠梗阻

E.粘连性肠梗阻

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完形填空。

     "It's my own fault." Carl Fenter pulled his jacket closer against the abnormal bite of cold morning wind.
"The rest of the family is home, where it's   1  ."
     Just another one of his   2   ideas-a big tamale (玉米粉蒸肉) feast after tonight's Christmas Eve service
at the church-and look where it landed him: waiting in a line 50 people deep.
     Who would have guessed that the tamale in every shop in the city would be sold out the day before
Christmas? But they   3  , as Carl knew. He had been driving all over El Paso that morning.   4   to bring
home tamales, Carl tried one last shop, an old favorite out in Canutillo.
     When he arrived, a fresh batch (一炉) was   5   off the steamer in 45 minutes.   6   at the end of the
snaking line of tamale-seekers, he watched the woman in front of him   7   her jacket to cover her shivering
youngster. It wasn't long before she, too,   8   in the biting wind. After only a moment's   9 , Carl took off
his own jacket and offered it to the  10  mother.
     Together, they  11  when the line slowly moved forward at last, and smiling people exited the shop carrying
steamy bags.  12 , Carl got inside the door and  13  closer to the counter, the woman now first in line. "Sorry
folks," the clerk announced, "that's the last of the tamales." " 14 !" Carl groaned (抱怨) with everyone else  15
behind him.
     " 16 ," stressed the man at the counter, "we'll have a final batch ready  17 , oh, about two hours."
     Defeated, Carl backed away,but the young mother grabbed his arm.
     "You're leaving?"
     "I  18 ," Carl glanced at his watch. "I promised to put up luminarias (传统圣诞灯) at my church."
     "I'll get your order of tamales and bring them to your house."
     Carl's brow furrowed "I couldn't ask you to do that."
     "But it's  19  I can do. You lent me your coat." Her smile overrode (推翻) his objections. "Just give me
your address." She and her little girl settled in for the long wait.
     And at  20  noon on Christmas Eve,they delivered four dozen fragrant tamales-along with Carl's brown
jacket-to his home.

( )1.A.harmonious
( )2.A.brilliant
( )3.A.were
( )4.A.Decided
( )5.A.ready
( )6.A.Finding his way
( )7.A.move　　
( )8.A.waved
( )9.A.assumption
( )10.A.grateful
( )11.A.cheered
( )12.A.Immediately
( )13.A.shouldered his way
( )14.A.No problem
( )15.A.lined up
( )16.A.So
( )17.A.before
( )18.A.plan to
( )19.A.the least
( )20.A.just

B.warm
B.bad
B.did
B.Determined
B.prepared
B.Taking his road
B.reject
B.froze
B.appreciation
B.respectful
B.congratulated
B.Hopefully
B.forced his way
B.No way
B.held up
B.But
B.for
B.intend to
B.the most
B.exactly

C.happy
C.stupid
C.could
C.Wanted
C.soon
C.Taking his place
C.abandon
C.shook
C.hesitation
C.hopeless
C.shouted
C.Lastly
C.felt his way
C.No doubt
C.looked up
C.Then
C.in
C.have to
C.the last
C.accurately

D.pleasant
D.common
D.had
D.Expected
D.due
D.Finding his place
D.remove
D.shocked
D.attention
D.shameful
D.screamed
D.Finally
D.inched his way
D.No wonder
D.waited up
D.Besides
D.after
D.ought to
D.the best
D.right

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我国现行图书购销形式包括（）等。

A.网上营销

B.经销

C.批零兼营

D.经销包退

E.寄销

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科学发展观根本方法是统筹兼顾，五个统筹包括哪些内容呢？

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