防突工在现场收集资料时，应做到（）。
A、全面
B、真实
C、可靠
D、推断
E、猜测
参考答案：A, B, C
— It is said that the cycling race around the Qinghai Lake was very hard.
— So it was. Only a handful of cyclists made _______.
A．one
B．it
C．that
D．them
胸痛的病因正确的是
A．胸壁疾病B．心血管疾病C．呼吸系统疾病D．纵隔疾病E．以上均是
