Five years ago,we lived in a small house. There was a small tree beside the house. There was a small dog in my house.
Now,we live in a big house. There is a big tree beside the house. There are three dogs in my house.
下面是宏达超市甜点的价格表。
XXY
XXX
XYY
YY
OY
XO
性别
雌性
﹣﹣
雄性
育性
可育
死亡
不育
说明:性染色体组成为XO、OY的果蝇体细胞内只含1条性染色体X或Y.
答案:解答:延长BD交AC于点F,
∵∠BDC是△CDF的外角,∠C=40°,∠BDC=150°,
∴∠CFD=∠BDC-∠C=150°-40°=110°,
∵∠CFD是△ABF的外角,
∴∠BAC+∠ABD=∠CFD=110°,
∵∠ABD,∠BAC的角平分线交于点E,
∴∠BAE+∠ABE= (∠BAC+∠ABD)= ×110°=55°,
∴∠AEB=180°-(∠BAE+∠ABE)=180°-55°=125°;