mountain-and-valley
1.Yosemite National Park embraces a spectacular tract of mountain-and-valley scenery harboring a grand collection of waterfalls, meadows, and forests.
6.The results showed that: ① the integrated ecological risk was presented symmetrically along Brahmaputra, and was mitigated from valley farming area to mountain pastoral area; ② the hazards of main risk sources to risk suffer in each sub-region was differently, drought was the common risk source and imperils farming and stock raising severely; ③ aimed at enhancing the ability of fighting drought, controlling flood and stabilizing sand engineering measures should be taken steps to prevent those hazards; mountain hazards must be controlled in resident area and along arterial traffic; manual work should be done to void hail in those area where hails attacked heavily; there is need to promulgated risk knowledge to herdsmen for strengthening their risk consciousness and improve the ability of preventing risk and self-help after hazards happened in the pasturing area.
8.(3)The geograph y distribution of the road γ radiation dosage is similar, i．e:the middle moun tain area in the North is highest,the low mountain area in the Southeast and the East are the second．The river valley and flat land area in the Southwest is lo west．(4)The land γ radiation dosage rate of different road pavement is in sequ ence:clay road＞macadam road＞brick road＞tar road＞cement road．
