某分部工程双代号网络计划如图所示。图中标出每个节点的最早时间和最迟时间,该计划表明()。
A.工作①—③为关键工作
B.工作—④的总时差为1
C.工作③—⑥的自由时差为1
D.工作⑥—⑩的总时差为3
E.工作④—⑧的自由时差为1
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APP具体操作流程为:
下列词语没有错别字的一组是:[ ]
A、哽咽 鮭珍 磕死 归聘 素兴夜寐
B、鼓瑟吹笙 青青子衿 呦呦鹿鸣 何时可掇
C、放浪形骸 崇山俊岭 清流急端 情随事迁
D、余音袅袅 正襟偎坐 杯盘狼迹 酾酒临江
阅读下列各小题,根据括号内的汉语提示,用句末括号内的英语单词完成句子。
1. He _______________ (总是协助老师做) the experiment at the weekends. (assist)
2. I would rather you _______________ (没有逃学) yesterday. (leave)
3. _______________ (Tom从座位上摔下来) got the classmates laughing. (fall)
4. They would talk long hours together, ________________ (他们每次见面). (time)
5. _______________ (没有收到答复), Bill decided to made an application for a loan(贷款) again. (receive)
6. _______________ (他脸上激动的表情) suggested that he had passed the test. (excite)
7. Such a loud noise did they make _______________ (以至于我无法专心读书). (absorb)
8. Few measures _______________ (采取措施) to make the waste water clean in the past three years. (take)
9. ______________ (尽管是个女孩), Joan of Arc (圣女贞德) showed great bravery in the battle. (as)
10. We _______________ (本不需要乘出租车) to the station; it's only a five-minute walk from here. (need)
简述农业政策实施的影响因素。
简述完全成本定价法的优点。
在GSM系统中首先使用了( ),它实现了机卡分离,提高了用户使用移动电话业务的便利性。
A.基站系统(BSS)
B.用户识别模块(SIM)
C.访问位置寄存器(VLR)
D.归属位置寄存器(HLR)