载荷传感器采集周期不能小于（）秒，否则会造成功图采集错误。
A.1000
B.2000
C.3000
D.无规定
参考答案：C
Let's go and have a drink. We've got _____ time before the train leaves. [ ]
A. a little
B. few
C. little
D. a few
同时打开防喷器侧门可能会造成什么后果？
