可以是练习者建立对球的敏感性，具备良好的球感的练习方法是（） A.踢球腿前摆时，小腿

发布时间：2020-01-21 11:32 │ 来源：www.tikuol.com

题型：单项选择题

问题：

可以是练习者建立对球的敏感性，具备良好的球感的练习方法是（）

A.踢球腿前摆时，小腿过早前移，造成直腿踢球，出球无力

B.停球方法

C.颠球

D.运球突破是获得定位球的有效手段之一

考点：大学体育理论足球考试足球考试题库

题型：单项选择题

根据短文内容，完成下面的表格，每空一词。

     Nowadays many new and useful inventions have come into use. If I were a scientist, I would have my
own invention a magic door, which can take me to every part of the world, just like Doraemon's magic door.
    Since our life is getting busier and busier, my magic door is really needed. The population of the world is
rising day by day, and the number of cars is getting larger. Therefore, traffic becomes a big problem to
people in both poor and developed countries. Moreover, by using a large number of ears, people have to face
another problem the pollution of the air. All those reasons lead to the need for such an invention a magic door.
    Magic doors have many advantages. Firstly, you can go wherever you want in a minute. Just open the door
and go through it, and you can stand in another place. Secondly, magic doors sometimes can even make people
safe. Magic doors can be used in everyday life. For example, if you fall in the river, it can help you go out of
the river.
    All in all, people can get many good things from magic doors. The magic door would be a big change in
our life!

If could, I would have my own l______ the magic door
The problems of using a large number of cars	The advantages of the magic door
●The 2______ jam (拥堵)	●Go 4______ they want
●The 3______ of the air	●Make people 5______

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题型：单项选择题

如图所示为电场中的一根电场线，在该电场线上有a、b两点，用E_a、E_b分别表示两处场强的大小，Φ_a、Φ_b分别表示两处电势高低．则（　　）

A．顺着电场线由a向b移动电荷，电势能降低

B．因为电场线由a指向b，所以E_a＞E_b

C．因为电场线由a指向b，所以Φ_a＞Φ_b

D．顺着电场线由a向b移动电荷，若电势能增加，则被移动电荷一定带负电

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题型：单项选择题

某同学为了研究规格为“2v，0.36W”小灯泡的伏安特性曲线，现备有下列器材：

①电源E(干电池两节，内阻很小)

②电压表V（量程3V，内阻约5kΩ）

③毫安表mA（量程50mA，内阻为3Ω）

④定值电阻三个：R₁=1Ω,R₂=3Ω,R₃=6Ω

⑤滑动变阻器R₀(最大阻值10Ω，额定电流1.5 A )

⑥开关S及导线若干

根据以上器材试解答下列问题

（1）该同学通过研究发现毫安表量程过小，因此在三个定值电阻中选择电阻 ______(填 R₁或R₂，R₃)将毫安表虽程扩大，以满足实验要求。

（2）请在虚线方框内画出实验的原理图，并在图中标出题中所给的表示各元件的符号。

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题型：单项选择题

双侧肾动脉狭窄患者禁服的降压药是（）

A.钙拮抗剂

B.ARB

C.利尿药

D.ACEI

E.血管扩张剂

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题型：单项选择题

录井草图上2个录井间距以下的层在录井综合图上可综合解释为（）。

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