试题与答案

“在水中能下沉的物体是否受到浮力呢?”小明决定通过实验探究.他取了一个重为1N的

题型:问答题

题目:

“在水中能下沉的物体是否受到浮力呢?”小明决定通过实验探究.他取了一个重为1N的铝块,挂在弹簧测力计上,当铝块浸没在水中时,弹簧测力计的示数为0.63N.依据小明的实验可知铝块受到了水的浮力作用,且铝块所受的浮力大小为______N.接下来,小明又做了进一步的探究,他让浸没在水中的铝块处在不同的深度,然后观察弹簧测力计的示数是否变化,小明的设计是想探究______.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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题型:阅读理解

To protect you and your fellow passengers, the Transportation Security Administration (TSA) is required by law to inspect all checked baggage. As part of this process, some bags are opened and inspected. Your bag was among those selected for inspection.

During the inspection, your bag and its contents may have been searched for items forbidden by law such as fireworks, fuels, gunpowder, etc. At the completion of the inspection, the contents were returned to your bag, which was resealed (重新封口) with a “special” lock.

If the TSA screener was unable to open your bag for inspection because it was locked, the screener may have been forced to break the locks on your bag. TSA sincerely regrets having to do this, and has taken care to reseal your bag upon completion of inspection. However, TSA is not liable for damage to your locks resulting from necessary precaution.

For packing tips and other suggestions that may assist you during your next trip, visit: www.tsatraveltips.us.

We appreciate your understanding and cooperation .If you have questions, comment,or concerns , please feel free to contact the Transportation Security Administration Consumer Response Centre:

Phone: toll-free at (866)289-9673

Email:telltsa@tas.dot.gov

Section 110(b)of the Aviation and Transportation Security Act of 2001,49

USC&44901(c)-(e)

小题1:The leaflet(宣传单) is trying to __________.

A.introduce one of the security acts

B.persuade people to contact TSA

C.warn against the damage of locking the baggage

D.inform people of baggage inspection小题2:The leaflet is most probably provided by TSA to those who __________.

A.had their baggage selected for inspection

B.refused to have their baggage checked

C.kept some damaged items in their baggage

D.left their baggage unlocked小题3:The underlined word “liable” means ___________.

A.suitable by law

B.permitted by law

C.responsible by law

D.prepared by law小题4:For packing tips and other suggestions, visit __________.

A.telltsa@tas.dot.gov

B.www.tsatraveltips.us

C.toll-free at (866)289-9673

D.TSA Consumer Response Centre

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