“五一”黄金周，小明同学和爸爸妈妈一起游览花果山，在他们乘坐旅游车沿盘山公路下山

发布时间：2017-06-08 20:01 │ 来源：www.tikuol.com

题型：选择题

问题：

“五一”黄金周，小明同学和爸爸妈妈一起游览花果山，在他们乘坐旅游车沿盘山公路下山的过程中，发现司机师傅要不时地踩踏刹车踏板，当车行驶至中途还要停下来，让工作人员用水龙头向车轮闸片部位喷水．小明同学提出了以下几种看法：

①喷水的主要目的是为了降低车闸的温度，以防车闸因温度过高而损坏

②下山过程中，机械能不变

③下山过程中，重力对汽车不做功

④刹车过程中有部分机械能转化为内能

你认为这些看法中符合实际的是（　　）

A．①②④

B．①④

C．①③④

D．①②③④

考点：汽化及汽化的特点功的概念机械能与其他形式能量的转化

题型：选择题

完形填空。

     Last May I stayed in Paris for a week. That was my ___1__ trip there. One morning I ___2__ out to
visit EuroDisney, but I didn't know ___3___ way to go, so I stopped a stranger and asked, "Excuse me,
does this street lead to EuroDisney?  Yes," he answered. "Go along this street and turn left at the second
turning. You can't ___4__ it. "
     So I ___5__ two blocks and turned to my left, but EuroDisney ___6__ there. Then I asked a second
stranger. He said, "Go along this street and turn left at the second turning." But ___7__ I couldn't find Euro
Disney. I asked a third stranger and he gave the same answer. But this time I found EuroDisney. Just then
___8__ walked up and said, "Excuse me, where is the __9___ bank?" I answered __10__, "Go along this
street and turn left at the second turning!"

( )1. A. one
( )2. A. went
( )3. A. how
( )4. A. get
( )5. A. walked
( )6. A. were
( )7. A. again
( )8. A. no one
( )9. A. nearest
( )10. A. early

B. first
B. stopped
B. why
B. miss
B. made
B. had
B. at first
B. someone
B. nearer
B. quietly

C. two
C. flied
C. which
C. see
C. turned
C. wasn't
C. at last
C. anyone
C. near
C. later

D. twice
D. ran
D. when
D. arrive
D. kept
D. was
D. nobody
D. nobody
D. cheapest
D. quickly

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题型：选择题

担子果

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题型：选择题

关于分泌性中耳炎错误的是（）。

A.分泌性中耳炎是以鼓室积液及传导性耳聋为主要特征的中耳非化脓性疾病

B.病因与咽鼓管功能障碍、感染和免疫反应等有关

C.分泌性中耳炎是无菌性炎症，与细菌和病毒感染无关

D.中耳积液多为漏出液、渗出液和分泌液的混合液

E.清除中耳积液、改善中耳通气引流及病因治疗是本病的治疗原则

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题型：选择题

体内脱氧核苷酸是由下列哪类物质直接还原生成的

A．核糖核苷
B．一磷酸核苷
C．二磷酸核苷
D．三磷酸核苷

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题型：选择题

餐饮单位使用杀虫剂、灭鼠药时，首先应注意的是（）。

A.虫害杀灭的效果

B.是否会对食品和操作设备造成污染

C.价格问题

D.购买途径

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