工程咨询服务招标中，( )只是在谈判时才被打开，作为谈判的内容之一。
A．财务建议书B．技术建议书C．投标文件D．合同价格
参考答案：A
After he became conscious, he remembered ______ and ______ on the head with a rod. [ ]
A. to attack; hit
B. to be attacked; to be hit
C. attacking; be hit
D. having been attacked; hit
A、B为同主族的两元素，A在B的上一周期，若A的原子序数为n，则B的原子序数不可能为 [ ]
A、n+8
B、n+18
C、n+32
D、n+20
