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һДξors?
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ҳɺ;(ni)߉
҂ɌLyľДr҂Ҫ_ʼ@Ӄ(ni)߉PϵMзںξf҂Ҫҳ@ӵɣҲ^eZڏsf҂ҪľǷs(ni)־֮g߉PϵھӺ}߉PϵքeķNСD(zhun)^ҪД߉Pϵx^Ќ߉~andbutbecauseȵ
xҵɺ߉Pϵ
҂Ɍӵķ֮҂Ҫȥx@r҂ֻȥx҂Ҫx҂MзĽY(ji)ɺ߉Pϵ
ԓ}Ly͆}£
If the pores are large, the water in them will exist as drops too heavy for surface tension to hold, and it will drain away; but if the pores are small enough, the water in them will exist as thin films, too light to overcome the force of surface tension holding them in place; then the water will be firmly held.
12. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
҂ҪДһ@ʲô(j)ӵ˼;гF(xin)ķ̖҂Д@һs
Ȼ҂́Ҹ־gɺ߉Pϵx^@Ԓ֮֮҂Ե֪@Ԓķ־v˿״ͿСɷNrһbutԿДɂ־g߉ԓD(zhun)Pϵô҂ҪxD(zhun)۵D(zhun)ʲô@Ԓ˼ǣܴˮ͕ˮδ;Сˮ鱡ĤҊD(zhun)۵ă(ni)ǴСˮκͱĤ֮gČ
Дҵɡ߉Pϵ҂́һx헡xɺ߉Rȫ_x헡e
A. Surface tension is not strong enough to retain drops of water in rocks with large pores but it strong enough to hold on to thin films of water in rocks with small pores.
B. Water in rocks is held in place by large pores and drains away from small size pores through surface tension.
C. Small pores and large pores both interact with surface tension to determine whether a rock will hold water as heavy drops or as a thin film.
D. If the force of surface tension is too weak to hold water in place as heavy drops, the water will continue to be held firmly in place as a thin film when large pores exist.
Ax헴D(zhun)߉~butv״ĕrˮ׃ˮΣbutСĕr׃ɱĤ߉Rȫ_BxeȱD(zhun)߉~C xҲ߉Pϵ˲andHϑԓD(zhun)PϵDxf״ĕr׃ɱĤ@ԭ˼ȫ෴ԭfˮڿ״ĕrԓ׃ˮ