浮物曲线的代表符号式（）。
A、λ
B、δ
C、θ
D、β
参考答案：D
泡性角结膜炎常见的致病微生物是
A．β溶血性链球菌
B．克雷白杆菌
C．结核杆菌
D．大肠杆菌
E．金黄色葡萄球菌
—What are they talking about?
—A new film _______ by Steven Spielberg who is a very famous director in the USA. [ ]
A. produced
B. was produced
C. producing
D. will be produced
