正确答案: D

受抑制物质影响

题目：瓜类种子不可能在果实内萌发，是因为种子( )。

解析：D

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举一反三的答案和解析：

[单选题]

B．work C．school D．hospital

school

[单选题]下列叙述错误的是

乙烯和苯都能使溴水褪色，褪色的原因相同

[单选题]根据下面内容，回答 60 ~63 题： BComputer 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(信用卡)．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 releases(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

He has a handsome income.

[单选题]现代裸子植物中最原始的类群是( )。

苏铁纲