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问题 多选题

如图所示是一列简谐横波t=0时刻的图象，经过△t=1.2s时间，恰好第三次重复出现图示的波形．根据以上信息，下面各项能确定的是（　　）

A．波的传播速度的大小

B．经过△t=0.3 s时间，质点P通过的路程

C．t=0.6 s时刻质点P的速度方向

D．t=1.0 s时刻的波形图

答案

A、由波动图象读出波长λ=8m．根据经过1.2s该波形恰好第三次重复出现，得到2T=1.2s，则周期T=0.6s，由公式v=

λ
T
确定出波速v=
40
3
m/s．A符合题意，故A正确．

    B、经过0.3s，即半个周期，质点P通过的路程是S=2A=20cm．B符合题意．故B正确．

    C、由于波的传播方向不确定，P点的速度方向不确定．C不符合题意，故C错误．

    D、t=0.6s时的波形图与图示时刻重复，是确定的．D符合题意，故D正确．

故选ABD

阅读理解
请阅读下列应用文及相关信息,并按照要求匹配信息.
首先,请阅读下列几种急救措施的相关信息:
                                                                                                      A   
     If the person has stopped breathing, you must try to start his/her breathing at once. The best thing
is to use the mouth-to-mouth way. Lay the person down with his/her head lower than the rest of his/her
body and breathe into his/her mouth. If the person has something stuck in his/her throat, try to remove
it with your fingers, or by hitting him/her on the back.

                                                                           B    
     If the person is bleeding badly, you must try to stop the bleeding. Press on the bleeding point
with a piece of clean cloth and hold up the part of body which is bleeding. Bleeding from large
cuts may require immediate medical treatment.

                                                                             C
    If you are bitten and scratched by an animal, apply pressure to the area with a clean
bandage or towel until the bleeding stops, and then wash the cut under cold running water.
Cover the broken part if there is any, with a piece of clean cloth. Then see a doctor as soon
as possible.

D
    If you are hurt by fire or something very hot, cool the burnt part at once. Run cool (not cold) water
over the burnt part until it is less painful. Put a piece of dry clean cloth over the burnt part. If the area
is large, use a tub, shower or a garden hose.

E
    If there is a fire, never use a lift in the building because it’s very dangerous. The lift may get trapped
between floors. Use the stairs and leave the building at once. It is the safest way to leave the high
building when the fire happens.

F
    If some people have swallowed poison, they should be taken to a hospital at once. With some sleeping
pills, for example, it is a good thing to make the patient sick by pushing your fingers down his throat.
But if he has swallowed some kind of acid, or anything that burns, it would be a bad thing to make him
sick. The poison would burn his throat as it came up.

     以下是五人所遭遇的情况,请匹配适合他们的应对措施.
1．Liz is a housewife and lives in a high building. One day when she was cooking, she heard
some people crying "fire". A house near hers was on fire.
2．Anthony is a student journalist in the university. One day, he met a big black dog on his way
to an important interview. The dog bit him deeply.
3．Jeremy, a cook, sometimes cuts his hands during processing his food. But this time, he ate
mushroom carelessly which may be poisonous.
5．Lisa found a drowning man near a river. Someone had rescued him but he fell in a faint and
didn't breathe. How to help him?
5．Janet, a policewoman, often deals with some accidents. Today, she came to the scene of an
accident where a girl lying on the ground is bleeding. It seemed that she was badly hurt.
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单项选择题

关于普鲁卡因胺的叙述，下面哪项正确：

A．药理作用与奎尼丁相似但无明显阻断胆碱或α肾上腺素受体作用

B．红斑性狼疮样综合征以快代谢者易发生

C．属ⅠB类抗心律失常药

D．常用于室上性心动过速

E．长期口服不良反应少见
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