在玻璃中加入着色氧化物,如氧化铁、氧化镍、氧化铬等,能使玻璃的()。 ["A.可见性增强 ","B.吸热功能提高 ","C.吸热功能降低 ","D.保温性降低"]
You are implementing an ASP.NET AJAX page. You add the following control to the page. You need update the contents of the UpdatePanel without causing a full reload of the page. Which two actions should you perform?() ["Add the following control before the UpdatePanel.

","Add the following control within the UpdatePanel.

","Add an AsyncPostBackTrigger that references Timer1.","Add a PostBackTrigger that references Timer1."]
简述短期有价证券的特点及企业持有的原因。
拒付汇票在提示时,遭遇付款人拒绝付款或承兑,或者付款人拒不见票、死亡、宣告破产,致使付款(承兑)成不可能,通称拒付,又称退票。
下列选项中()按钮是插入Fireworks HTML。 ["A","B","C","D"]
简述邻里关系对犯罪的直接影响。