You are attending a meeting on Microsoft Windows Meeting Space. At the same time, you attempt to join a second meeting also hosted on Windows Meeting space. The dialog box that allows you to join the second meeting fails to open. You need to join the second meeting. What should you do?（） ["A","B","C","D"]
QT400―18属于（）铸铁的牌号。 ["球墨","可锻","灰","蠕墨"]
个性倾向和个性心理特征有机综合体现在一个人身上就构成了一个人完整的（）
广义的影子价格包括（） ["社会折现率","外汇的影子价格","劳动力的影子价格","土地的影子价格","一般商品货物的影子价格"]
下列焦化产品中闪点最低的是（） ["重蜡油","蜡油","柴油","汽油"]
穴状整地是我国北方常用的整地方法，其适用条件为（）。
