正确答案: B

错误

题目：姜科和兰科植物花的唇瓣都是由雄蕊变态而来的。( )

解析：B

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举一反三的答案和解析：

[单选题]人的耳朵有耳垂和无耳垂是一对相对性状。为了解该性状的显隐关系和遗传方式，兴趣小组拟对本校学生及其家庭进行调查，指导老师建议的调查步骤有：①设计调查方案；②收集、整理和分析数据；③确定调查内容；④撰写调查研究报告。你所确定的调查活动的合理流程为

③→①→②→④

[单选题]Doctors say that exercise is important for health, but it _______ be regular exercise.

must

[单选题]What is the inegge mainly expressed in the story?

We should avoid judging people by their appearances.

[单选题]下列藻类中属于单细胞且能游动的是( )。

裸藻

[单选题]She is very dear to us. We have been prepared to do it takes to save her life.

whatever

[单选题]Section B (18 marks)Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.

dog

[单选题]肉质植物属于( )，其叶内贮多量水分。

旱生植物

[单选题]根据内容， 回答下面问题：Computer programmer David Jones earns￡35,000 a year designing new computer games, yet he cannot find a bank ready to let him have a credit card. Instead, he has been told to wait another two years, until he is 18. The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David’s firm neleases(推出)two new games for the fast growing computer market each month.But David’s biggest headache is what to do with his money. Even though he earns a lot, he cannot drive a car, take out a mortgage(抵押贷款)，or get credit cards. David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop.“I got the job because the people who run the firm knew I had already written some programs,”he said. David spends some of his money on records and clothes, and gives his mother 50 pounds a week. But most of his spare time is spent working.

He has a handsome income.

[单选题]从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。21. John plays basketball well, ___his favorite sport is badminton.

yet