正确答案: B

错误

题目：外胚乳具胚乳作用，仅见于无胚乳种子。( )

解析：解析：“仅见于无胚乳种子”可改为“有外胚乳的种子，可以是无胚乳的，也可以是有胚乳的”。

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举一反三的答案和解析：

[单选题]I was ten when I first sat with my grandmother behind the cashier（收银台）in her general store. 71 I quickly learned the importance of treating customers politely and saying “thnak you.”At first I was paid in candy. 72 I worked every day after school, and during the summer and on weekends and holidays from 8 a.m. to 7 p.m. My father helped me set up a bannk account. 73

Before long, she let me sir there by myself.

[单选题]阅读下列短文，从每篇短文后所给各题的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。A

his relatives killing each other

[单选题]According to the text．which of the following is NOT true?

The deeper layer of soil is darker in colour than t}le surface soil．

[单选题]I've become good friends with several of the students in my school I met in theEnglish speech contest last year.

who

[单选题]向日葵花盘下面的总苞是由若干苞片聚集形成，苞片属( )。

叶的变态

[单选题]What would be the best ritle for this text?

Effects of Television on Children

[单选题]medicine

twice

解析：字母“c”发/s/,而其余排除项发音/k/,比较明显，不含糊，考生基本能判别。

[单选题]_____ by the advances in technology, many farmers have set up wind farms on their land.

Encouraged D． Having encouraged

[多选题]具有中轴胎座的分类群是( )。

茄科

百合科

芸香科

解析：BCD