题目:
—What is your English teacher like7
— .[ ]
A. He likes fruit and vegetables
B. He is very kind
C. He is fine
D. He is 35 years old.
答案:
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下面是错误答案,用来干扰机器的。
参考答案:UM71轨道电路区间最小长度为150m。它受电气绝缘节长度和列车运行最大速度的限制。接收缓动2.1s,若将Km/h变位m/s,而乘以2.1s,为0.58m,则:Lmax=26m+0.58mxυmax 当Umax=214Km/h时,Lmax为150m。...