一个圆形花坛，周长为9.42米，在离开花坛边0.5米的外面围一个圆形栏杆，则栏杆

已知碳-12原子的质量为1.993×10^-26kg，A原子的质量为5.146×10^-26 kg，若A原子核内质子数比中子数少1个．求：

（1）A原子的相对原子质量．

（2）A原子的核外电子数．

（3）写出A原子的元素名称及元素符号．

词汇运用

根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。在答题卡标有题号的横线上，写出空缺处所填单词的正确形式。(每空一词)

小题1:The report written by the school caught several _________(科学家) attention.

小题2:It’s said that the young man went abroad for further education alone in his ______. (四十)

小题3:It’s hard to ___________ (想象) living in a place where there are no cars .

小题4:In order to get to the nearest village, we have to walk ____________ (穿过) a bamboo forest.

小题5:“Lost in Thailand” is a new movie _________(导演) by Xu Zheng, which attracted a lot of attention.

小题6:We all know there are lots of __________ (advantage) of living on Mars. So we won’t move out of Earth to Mars.

小题7:The young people built the new house ______. (them)

小题8:Don’t keep the room _________(close) when you stay in it.

小题9:The boy has been used to _________(lie) when he makes a mistake.

小题10:It’s          (true) possible that most of us can go to our ideal school.

(一) 某城市道路工程项目合同工期为18个月。施工合同签订以后，施工单位编制了一份初始网络计划，如下图所示。

由于该工程施工工艺的要求，计划中工作C、工作H和工作J需共用一台起重施工机械，为此需要对初始网络计划作调整。
[问题]

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