正确答案: D

②、④、⑤

题目：是被子植物起源单元说的主要代表人物。①恩格勒 ②哈钦松 ③胡先驌 ④塔赫他间 ⑤克朗奎斯特

解析：D

查看原题

举一反三的答案和解析：

[单选题]核型胚乳中胚乳细胞形成的方式是( )。

先产生核后产生壁

[单选题]A very B also C seldom D not

not

[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]药品监督管理部门对有证据证明可能危害人体健康的药品可以（ ）。

采取查封扣押的行政强制措施

[单选题]洋葱根尖细胞有丝分裂观察实验中用的染料是( )。

醋酸洋红染液