有谁知道英文数学题中的bearing问题(方位)一定是从北边开始的吗
\u8c01\u80fd\u89e3\u91ca\u4e00\u4e0b\u8fd9\u9053\u82f1\u6587\u6570\u5b66\u9898\u4e2dbearing\u7684\u610f\u601d\u554a\u4eceA\u5230B\u7684\u65b9\u5411\u4e0a\u7684\u8ddd\u79bb
bearing:\u65b9\u4f4d
meaning:the situation or horizontal direction of one point with respect to another or to the compass (\u97e6\u6c0f\u5b57\u5178)
Two numbers are in the tatio 2:3. When 4 is added to each number the ratio changes to 5:7.
The sum of the two original numbers is
\u3010\u4e24\u6570\u4e4b\u6bd4\u4e3a2\uff1a3\uff0c\u5f53\u6bcf\u4e2a\u6570\u52a0\u4e0a4\u65f6\uff0c\u65b0\u7684\u4e24\u6570\u4e4b\u6bd4\u4e3a5\uff1a7\uff0c\u6c42\u539f\u6765\u4e24\u6570\u4e4b\u548c\u3011
\u5047\u8bbe\u539f\u6570\u4e3ax y
x/y=2/3 >> 3x=2y >> x=2y/3
(x+4)/(y+4)=5/7 >>7x+28=5y+20 >>14y/3+28=15y/3+20
y/3=8
y=24
x=16
\u6240\u4ee5\u539f\u6765\u4e24\u6570\u548c\u4e3a24+16=40
\u5e0c\u671b\u56de\u7b54\u5bf9\u4f60\u6709\u5e2e\u52a9
绛旓細Our apple trees will bear well this year.浠婂勾鎴戜滑鐨勮嫻鏋滄爲浼氱粨璁稿鏋滃疄銆4.(渚濅竴瀹氭柟鍚)寤朵几 bear2 鍚嶈瘝 n. [C]1.鐔;浼肩唺鐨勫姩鐗 2.椴佽幗鐨勪汉;绗ㄦ嫏鐨勪汉 3.銆愮編銆戙愪繗銆戜郊浣艰 He is a bear at mathematics.浠栨槸涓鏁板澶╂墠銆4.(鑲″競涓)鍋氱┖澶磋;(瀵硅鎯)鐪嬭穼鑰 鍙婄墿鍔ㄨ瘝 vt.1.閫氳繃...
绛旓細Our apple trees will bear well this year.浠婂勾鎴戜滑鐨勮嫻鏋滄爲浼氱粨璁稿鏋滃疄銆4. (渚濅竴瀹氭柟鍚)寤朵几 bear2 KK: []DJ: []n.[C]1. 鐔;浼肩唺鐨勫姩鐗 2. 椴佽幗鐨勪汉;绗ㄦ嫏鐨勪汉 3. 銆愮編銆戙愪繗銆戜郊浣艰 He is a bear at mathematics.浠栨槸涓鏁板澶╂墠銆4. (鑲″競涓)鍋氱┖澶磋;(瀵硅鎯)鐪嬭穼鑰 vt....
绛旓細Our apple trees will bear well this year.浠婂勾鎴戜滑鐨勮嫻鏋滄爲浼氱粨璁稿鏋滃疄銆4. (渚濅竴瀹氭柟鍚)寤朵几 bear n.[C]1. 鐔;浼肩唺鐨勫姩鐗 2. 椴佽幗鐨勪汉;绗ㄦ嫏鐨勪汉 3. 銆愮編銆戙愪繗銆戜郊浣艰 He is a bear at mathematics.浠栨槸涓鏁板澶╂墠銆4. (鑲″競涓)鍋氱┖澶磋;(瀵硅鎯)鐪嬭穼鑰 vt.1. 閫氳繃鍗栫┖浣胯鎯...
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绛旓細bear2 鍚嶈瘝 n. [C]1.鐔;浼肩唺鐨勫姩鐗 2.椴佽幗鐨勪汉;绗ㄦ嫏鐨勪汉 3.銆愮編銆戙愪繗銆戜郊浣艰 He is a bear at mathematics.浠栨槸涓鏁板澶╂墠銆4.(鑲″競涓)鍋氱┖澶磋;(瀵硅鎯)鐪嬭穼鑰 铏界劧 涔熸湁浣间郊鑰呯殑鎰忔濓紝浣嗙敤浜庢煇涓棰嗗煙銆備綔涓哄悕瀛楀嚭鐜扮殑璇濓紝浜轰滑棣栧厛鎯宠捣鐨勫簲璇ユ槸鈥滅唺鈥濇垨鈥滅鎷欑殑浜衡濓紝寰堝鏄撹浜...
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