煤矿井下电缆连接应做到无鸡爪子，无羊尾巴，无明线接头。
参考答案：对
He was looking forward to __.[ ]
A. travelling
B. travel
C. have a trip
D. have a good time
急性阑尾炎的临床症状一般是
A．先发热，后恶心呕吐，接着右下腹痛
B．先恶心呕吐，接着发热，然后右下腹痛
C．先上腹痛或脐周痛，后恶心呕吐，右下腹痛
D．先发热寒战，接着呕吐腹泻，再右下腹痛
E．无一定规律
