运输炸药、电雷管的矿车或者车厢必须有专门的警示标识。
参考答案：对
I don't know how _____ read it. [ ]
A. to
B. is
C. has
D. have
患者男，29岁。因呕吐腹泻来诊，粪便实验室检查诊断为阿米巴痢疾，该患者典型的粪便是（）.
A.隐血便
B.果酱样便
C.洗肉水样便
D.黏液脓血便
E.外观正常
