在冬天,用手摸户外的金属比摸木块感到更冷,这是因为 A.金属温度比木块温度低 B

题型:选择题

问题:

在冬天,用手摸户外的金属比摸木块感到更冷,这是因为

A.金属温度比木块温度低

B.金属密度比木块密度大

C.金属硬度比木的硬度大

D.金属是热的良导体,木是热的不良导体

考点:内能的概念
题型:选择题

所有磨牙都有的结构是()

A.远中牙尖嵴

B.斜嵴

C.近中边缘嵴

D.横嵴

E.颈嵴

题型:选择题
已知向量
a
=(3,-1),
b
=(-1,2)
,则-3
a
-2
b
的坐标是(  )
A.(7,1)B.(-7,-1)C.(-7,1)D.(7,-1)
题型:选择题
A businessman had been on a long flight between meetings. After a while, a calm voice said, “We shall not be serving the drinks at this time as we are expecting a little turbulence(漩涡). Please be    1   your seat belt is fastened.”
As the businessman looked around in the aircraft, it became obvious that many  passengers were becoming a bit    2  . Later, the voice said, “We are so sorry that we are unable    3   the meal at this time. The turbulence is still ahead of us.”
Lightning    4   the darkening skies, and within moments that great plane was like a _  5   moving around on an ocean. One moment the airplane was    6   on terrific currents of air; the next, it dropped as if it were about to crash. All the passengers were upset and scared. Some were praying. The future seemed terrible and many were wondering if they would    7   it through the storm.
Then, he suddenly saw a little girl. Obviously the storm meant    8    to her. She was reading a book and everything within her small world was    9   and orderly. Sometimes she closed her eyes, then she would    10   again; then she would straighten her legs, but worry and fear were not in her    11  . All the adults were scared half to __12___, but the great child wasn’t afraid at all.
The businessman could hardly believe his eyes. When the plane finally    13   its destination, he asked why she had not been afraid. The child replied, “Because my Daddy’s the pilot, and he’s flying the plane to take me home.”
There are many kinds of storms that    14   us physically, mentally and financially. And many storms can easily and quickly darken our skies and    15   out planes into uncontrollable movement.
Let us remember: Our Father is the pilot. He is in control and taking us home. So don’t worry!
小题1:
A.quickB.sureC.trueD.worried
小题2:
A.excitedB.curiousC.happyD.nervous
小题3:
A.to serveB.to takeC.to finishD.to produce
小题4:
A.broke outB.lit upC.came acrossD.gave off
小题5:
A.birdB.boatC.planeD.person
小题6:
A.liftedB.squeezedC.knockedD.dropped
小题7:
A.makeB.getC.carryD.finish
小题8:
A.somethingB.anythingC.everythingD.nothing
小题9:
A.funnyB.easyC.movingD.calm
小题10:
A.lieB.readC.playD.smile
小题11:
A.bookB.worldC.storyD.body
小题12:
A.deathB.cryC.smileD.madness
小题13:
A.cameB.arrivedC.gotD.reached
小题14:
A.woundB.warnC.troubleD.kill
小题15:
A.reduceB.throwC.makeD.destroy
题型:选择题

最易合并脓胸的肺炎是

A.合胞病毒肺炎

B.金葡萄菌肺炎

C.支原体肺炎

D.腺病毒肺炎

E.间质性肺炎

题型:选择题

莫尼茨绦虫可感染  

A.仔猪

B.糼犬

C.糼驹

D.羔羊

E.雏鹅

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