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【单选题】
关于视细胞的描述错误的是
A.
视锥细胞对光敏感度低,但可辨红、绿、蓝色。
B.
视杆细胞对光敏感度高,但不能辨色。
C.
VitA缺乏,可导致夜盲症。
D.
若视杆细胞功能异常可导致色盲,常见红绿色盲。
E.
视杆细胞所含的感光物质称为视紫红质,视紫红质缺乏会导致弱光视力减退。
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举一反三
【单选题】Boys and girls . don’t forget your report . It ______ today .
A.
can’t finish
B.
can’t be finished
C.
should finish
D.
should be finished
【简答题】N EWS REPORT 2 L isten to a news report and choose the best answer to each question you hear.
【简答题】A.She wants to know where the report is. B.She doesn't want to read the report. C.She doesn't know what to do. D.She is willing to read the report.
【简答题】A.He hasn't read the committee's report yet B.He'll encourage the committee to finish the report soon. C.The committee took longer to finish the report than expected D.The committee's report contains ...
【简答题】感性思维、经验思维属于( )层次思维。
【简答题】下列属于皮亚杰提出的观点的是?A. 儿童的思维起源于动作,抽象水平的逻辑思维能力来自于对动作水平进行具有逻辑意义的概括和内化。 B. 数学可分为操作活动层次、映象层次、符号层次。 C. 数学概念的形成过程中,基于具体事物的感性体验和操作活动越丰富、越充分,儿童对相关数学概念的理解就会越具有逻辑性、概括性。 D. 学习数学包括三个阶段:自由游戏阶段——结构性经验阶段——再运用阶段。
【单选题】Section A N ews Reports . Questions 1 and 2 are based on the news report you have just heard.
A.
Her grandfather.
B.
Her grandmother.
C.
Her friend Erika.
D.
Her little brother.
【简答题】N EWS REPORT 3 L isten to a news report and choose the best answer to each question you hear.
【单选题】_____ you didn’t know the rules shouldn’t be an excuse for your failure to report.
A.
That
B.
What
C.
Because
D.
How
【单选题】________ you didn't know the rules won't be an excuse for your failure to report.
A.
That
B.
Where
C.
What
D.
Why
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