运送物料时,对信号把钩工有什么要求?
参考答案:
提升时严禁蹬钩、行人,牵引车数超过规定、连接不良或装载物料超重、超高、超宽或偏载严重有翻车危险时,严禁发出开车信号。
What is the way George thought of _______ enough money to buy the house?
A.to get
B.getting
C.having got
D.being got
求证:m取任何实数时,抛物线y=2x2-(m+5)x+(m+1)的图象与x轴必有两个交点.