【单选题】His new book will _____all her earlier ones.
【简答题】若一束光线的入射角为30°,则反射光线与界面的夹角为______. 若一束光线的反射光线与界面成30°,则反射光线与入射光线的夹为______. 若入射光线与平面镜的夹角为40°,则反射角为______; 若入射角增大10°,反射角将增大______.
【单选题】一束光线与平面镜成 30 °角,则反射光线与入射光线的夹角是 ( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【简答题】一束光线垂直入射到平面镜上,反射角为______;若一束光线的反射光线与界面成30°,则反射光线与入射光线的夹角为______。
【单选题】结球甘蓝从定植收获的时间60d,是属于( )
【简答题】一束光线垂直入射到平面镜上,反射角为______;若一束光线的反射光线与界面成30°,则反射光线与入射光线的夹角为______.
【单选题】Choose the best one among the given choices to explain the tense and voice of the following sentence:His new book will be published next month.
A.
present simple;passive voice
B.
future simple;active voice
C.
future simple;passive voice
D.
past simple; passive voice
【单选题】---- I like to read Chris Paine. ---- So do I. I hear he writes on his computer, and his new book will come out next week. Who is Chris Paine?
【简答题】如图所示,一束光线AO与平面镜成30°角入射,若保持入射光线的方向不变,使镜面绕O点顺时针转过10°角,则反射角变为________。