用配方法解方程x2﹣8x﹣5=0,则配方正确的是[ ]
A.(x+4)2=11
B.(x﹣4)2=21
C.(x﹣8)2=16
D.(x+8)2=69
答案:B
Miss Gao is going to stay at home with _____ children for the summer holidays. [ ]
A. she
B. her
C. hers
D. herself
推土机上坡行驶不得超过25°,下坡行驶不得超过()。
A.25°
B.30°
C.35°
D.40°