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【单选题】
下列关于生物学实验的叙述,不正确的有( ) 1 类胡萝卜素既吸收大量的红光也吸收大量的蓝紫光 2 绿叶中色素的提取和分离实验中,要注意不能让层析液没及滤液细线,目的是避免色素溶解在层析液中 3 将叶绿体色素提取液装入试管中,让一穿过该滤液后再经三棱镜对光进行色散,光谱的颜色明显减 弱的是绿光 4 溶解度最大的色素是叶绿素a 5 在“脂肪的检测和观察”的实验中用体积分数为50%的酒精洗去浮色 6 体积分数为95%的酒精加入无水碳酸钠可用于叶绿体中色素的提取 7“用高倍镜观察线粒体”的实验中需要用那绿染液染色 8在观察DNA和RNA在细胞中的分布的实验中,需用盐酸使组织中的细胞相互分离A.
③ ④⑥
B.
①③ ⑥⑧
C.
①③ ④⑧
D.
①③ ④⑥
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【简答题】1978年6月2日，在全军政治工作会议上发表重要讲话。讲话再次阐述了的哪个重要观点？
【单选题】1978年6月2日,邓小平在全军政治工作会议上发表重要讲话,对刚刚开展的真理标准问题讨论给予支持,并再次阐述毛泽东关于( )的观点。
A.
实事求是,一切从实际出发,理论联系实际
B.
从群众中来,到群众中去的群众路线
C.
独立自主,自力更生
D.
党的思想建设
【单选题】Can you tell me why _____ yesterday? [ ]
A.
are you late
B.
you were late
C.
were you late
D.
you are late
【单选题】听力原文： Were you the first or the last child in you family? Or were you a middle or an only child? Some people think it matters where you were born in your family. But there are different ideas about wh...
A.
They strongly believe in family rules.
B.
They are very likely to succeed in life.
C.
They tend to take responsibility for themselves.
D.
They are in the habit of obeying their parents.
【单选题】1978年6月2日,邓小平在全军政治工作会议上发表重要讲话,对刚刚开展的真理标准问题讨论给予支持,并再次阐述了毛泽东关于( )观点。
A.
实事求是，一切从实际出发，理论联系实际
B.
从群众中来，到群众中去的群众路线
C.
独立自主，自力更生
【单选题】听力原文： Were you the first or the last child in you family? Or were you a middle or an only child? Some people think it matters where you were born in your family. But there are different ideas about wh...
A.
They strongly believe in family rules.
B.
They are very likely to succeed in life.
C.
They tend to take responsibility for themselves.
D.
They are in the habit of obeying their parents.
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