D.warn against the damage of locking the baggage
69.The leaflet is most probably provided by TSA to those who
A.refused to check in their baggage
B.had their baggage selected for inspection
C.kept some damaged items in their baggage D.left their baggage unlocked
70.What is the meaning of “liable” as it is used in the text ?
A.responsible by law
B.permitted by law
C.suitable by law
D.prepared by law
71.Which of the following items is probably allowed in the checked baggage ?
E
All plant cells are capable of taking up water . Even dead ones do to a certain degree . Absorption of water by dead cell walls makes wood become larger . In common land plants , the living cells of roots take up most of the water . Land plants without roots do exist , however . Those greenish-yellow lichens(苔藓)you seen on rocks in the high mountains have no roots . Half a billion years ago , when water plants started to enter the land , the first land plants did not have roots .
Even among the flowering plants , one finds rootless forms . These flowering plants are “the higher plants” because they evolved(进化) recently and are thus considered higher on the evolutionary scale(进化树). In the Peruvian desert , there grows one of these rootless higher plants , a bromeliad . It is a relative of the pineapple . Even if this plant had roots , they would be of no use , because where the plant grows , it never rains . The plant gets its water only from the dew(露水)it collects at night , when its leaves cool off . Such rootless plants , of course , can be moved with ease , but they will only grow when they are placed out in the open . If they are placed too near a house , the radiation from the heat of the house prevents the leaves from cooling and so prevents dew from forming , and the plant dies . In the southern United States and in Puerto Rico , one sees bromeliads growing high above the streets on the insulation(绝缘物)of electric wires . These plants get their water from rain , and the only soil they ever come in contact with is the dust that may blow on their leaves .
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