关于免疫缺陷病的描述，正确的是

常用的塔式起重机，按其行走方式和构造分为            塔吊、附着式塔吊和爬升式塔吊。

问答题常用的塔式起重机，按其行走方式和构造分为            塔吊、附着式塔吊和爬升式塔吊。

When analyzing the setting where the audience read your...

单项选择题When analyzing the setting where the audience read your conference proposal, what information should you consider?
A、What subject they belong to
B、Where they work
C、Where they are from
D、What their educational background is

小李购买了一只股票，明年有35%的可能性收益率达到15%，35%的可能性收益率在5%，30%的可能性收益率在-...

单项选择题小李购买了一只股票，明年有35%的可能性收益率达到15%，35%的可能性收益率在5%，30%的可能性收益率在-20%，那么明年这只股票的预期收益率是()。