慢性职业病应在多长时间之内向当地职业病防治机构报告()
A.3天之内
B.24小时之内
C.15天之内
D.1个月之内
E.半年之内
参考答案:C
The two men are so alike that strangers find _____ difficult to tell one from the other.
A.it
B.them
C.her
D.that
割裂感性认识和理性认识会犯经验主义的错误,但可以避免教条主义的错误。( )