将坯料从准备场地转入上料场地就是原料发出结束。
参考答案：错
After two hours the children got to the hill, tired ______ happy. [ ]
A. and
B. but
C. although
D. however
生活困难的艾滋病病人遗留的孤儿和感染艾滋病病毒的未成年人接受义务教育，应当( )。
A．免收学费B．免收杂费和书本费C．补助生活费D．减收杂费
