()为第二类危险货物。
A.爆炸品
B.液化气体
C.易燃固体
D.氧化剂
参考答案:C
急性阑尾炎的最典型症状是()
A.恶心、呕吐
B.乏力、头痛
C.腹肌紧张
D.转移性右下腹痛
E.WBC升高
The kindergartener sat them down to read and paint,________ all the children wanted to do was to make a mess.
A.as
B.then
C.until
D.while