检测敏感度可达到皮克(pg)级水平的免疫学技术是 A.
对流免疫电泳 B.
免疫荧光抗体技术 C.
SPA 协同凝集试验 D.
放射免疫分析技术 E.
免疫酶组化染色技术

湿痰的特点是（）A、痰黄粘稠有块B、痰白清稀量多C、痰白量多易咯D、脓血痰味腥臭

单项选择题湿痰的特点是（）A、痰黄粘稠有块B、痰白清稀量多C、痰白量多易咯D、脓血痰味腥臭

下列 Python库或模块中，支持正则表达式语法的是____。 A. ...

单项选择题下列 Python库或模块中，支持正则表达式语法的是____。 A.
bs4 B.
lxml C.
re D.
json

Directions: For each numbered blank in the following pa...

单项选择题 Directions: For each numbered blank in the following passage there are four choices labeled [A], [B], [C], and [D]. Choose the most suitable one.
Our leisure will be different too. The home will become the center of entertainment through television and electronic games. More people will eat out in restaurants ______they do today; also they will have a much wider variety of food available.