The difference between the APCI and ESI is

不定项选择发包人发出的招标文件是属于合同法中的要约，而施工单位的投标属于承诺。（ ）

单项选择题Analyze the following statement, and then choose one of the options that you think is best to use in academic writing: “As I've said many times … the data are really just at best suggestive. There have been some cases that show there may be an effect, and there are others to show there's no effect, so I think, in terms of science, I don't think we can definitely say it works.” A、Most credible evidence presently available suggests that this drug fails to assist patients suffering from coronavirus infection B、Maybe it works, maybe it doesn’t. C、Only heaven knows whether it works. D、It only works (sometimes) if you believe in it.