2020骞存禉姹熷叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)椤�(2鏈�26鏃�)
2020骞存禉姹熷叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)椤岋細
1. 鏈堿鍜孊鍏╁€�(g猫)鍏徃鎯虫壙鍖呮煇闋�(xi脿ng)宸ョ▼銆侫鍏徃闇€瑕�300澶╂墠鑳藉畬宸ワ紝璨�(f猫i)鐢ㄧ偤1.5钀厓/澶�銆侭鍏徃闇€瑕�200澶╁氨鑳藉畬宸�锛岃不(f猫i)鐢ㄧ偤3钀厓/澶┿€傜稖鍚堣€冩叜鏅�(sh铆)闁撳拰璨�(f猫i)鐢ㄧ瓑鍟忛锛屽湪A鍏徃闁嬪伐50澶╁悗锛孊鍏徃鎵嶅姞鍏ュ伐绋�銆傛寜浠ヤ笂鏂规锛岃┎闋�(xi脿ng)宸ョ▼鐨勮不(f猫i)鐢ㄧ偤澶氬皯?
A.475钀厓
B.500钀厓
C.525钀厓
D.615钀厓
2. 鏌愭(j墨)鍫�(ch菐ng)涓€姊濊嚜鍕�(d貌ng)浜鸿閬撻暦(zh菐ng)42m锛岄亱(y霉n)琛岄€熷害0.75m/s锛屽皬鐜嬪湪鑷嫊(d貌ng)浜鸿閬撶殑璧峰榛�(di菐n)灏囦竴浠跺寘瑁归€氶亷鑷嫊(d貌ng)浜鸿閬撳偝閬炵郸浣嶄簬绲傞粸(di菐n)浣嶇疆鐨勫皬鏄�锛屽皬鏄庣偤浜嗙瘈(ji茅)鐪佹檪(sh铆)闁擄紝鍦ㄥ寘瑁归枊濮嬪偝閬炴檪(sh铆)锛屾部鑷嫊(d貌ng)浜鸿閬撻€嗚闋�(l菒ng)鍙栧寘瑁瑰苟杩斿洖銆傚亣瀹氬皬鏄庣殑姝ヨ閫熷害鏄�1m/s锛屽墖灏忔槑鎷垮埌鍖呰9骞跺洖鍒拌嚜鍕�(d貌ng)浜鸿閬撶祩榛�(di菐n)宸ヤ綔闇€瑕佺殑鏅�(sh铆)闁撴槸锛�
A.24绉�
B.42绉�
C.48绉�
D.56绉�
榛�(di菐n)鎿婁笅闋�(y猫)鏌ョ湅2020骞存禉姹熷叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)椤屽弮鑰冪瓟妗�
1.銆愮瓟妗堛€慍銆傝В鏋愶細鍋囪ō(sh猫)閫欓爡(xi脿ng)宸ョ▼绺介噺鐐�600锛屽墖A姣忓ぉ瀹屾垚2锛孊姣忓ぉ瀹屾垚3锛孉鍏徃鍓�50澶╁畬鎴愪簡100锛屽墿浣�500鐢盇鍜孊鍏卞悓瀹屾垚锛屽叡闇€500÷(2+3)=100澶�锛屽洜姝ゅ彲鐭ワ紝A涓€鍏卞仛浜�150澶�锛孊涓€鍏卞仛浜�100澶�锛屽墖绺借不(f猫i)鐢ㄧ偤1.5×150+3×100=525钀厓銆�
2.銆愮瓟妗堛€慍銆傝В鏋愶細灏忔槑鐨勬琛岄€熷害鐐�1m/s锛岃嚜鍕�(d貌ng)浜鸿閬撻€熷害鐐�0.75m/s锛屽皬鏄庨€嗚鏅�(sh铆)鐩稿皪(du矛)浜庡湴闈㈢殑閫熷害鐐�0.25m/s锛屽皬鏄庢嬁鍒板寘瑁规墍鐢ㄦ檪(sh铆)闁撶偤42÷(0.25+0.75)=42s锛屾鏅�(sh铆)灏忔槑璧伴亷鐨勮矾绋嬬偤(42×0.25)m銆傛嬁鍒板寘瑁瑰悗锛屽皬鏄庤繑鍥炴檪(sh铆)鐩稿皪(du矛)浜庡湴闈㈢殑閫熷害鐐�1.75m/s锛岄渶瑕佹檪(sh铆)闁撶偤42×0.25÷1.75=6s銆傚叡鐢ㄦ檪(sh铆)42+6=48s锛岄伕鎿嘋銆�
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