对于没有安全钳的对重（或平衡重）导轨，可使用成型金属板材，它们应作防腐蚀保护。
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The sales manager of a hotel is in charge of sales promotion.
A. 对
B. 错
Room rates for groups and FIT during the peak season are the same.
A. 对
B. 错
Hotels always give preferential rates to group bookings.
A. 对
B. 错
The peak season includes May, June, September, October and November.
A. 对
B. 错
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