正确答案: D

①、⑤、⑥

题目：三人在各自建立的被子植物分类系统中均坚持真花学说和单元起源的观点。①哈钦松(森) ②恩格勒 ③威兰 ④胡先骗 ⑤塔赫他间 ⑥克朗奎斯特

解析：D

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举一反三的答案和解析：

[单选题]She brought with her three friends, none of ______I had ever met before.

whom D． these

[单选题]某条多肽的相结分子质量为2778，若氨基酸的平均相对分子质量为110，如考虑终止密码子，则编码该多肽的基因长度至少是

75对碱基 78对碱基 90对碱基 93对碱基

解析：根据题中条件可知该多肽由30个氨基酸组成，则应为30个密码子再加上终止密码子应为31，编码多肽的基因碱基为31×6=186，93对碱基。

[单选题]近代早期（16—18世纪）是欧洲重要的社会转型时期。回答19-21题。19.哥白尼学生虽被后来的科学发展所扬弃，但人们仍然视其为一场“革命”。这是因为它

撼动了中世纪神学基础，显示了挑战权威的态度

[单选题]虽然不同植物种子的形状各不相同，但它们的基本结构是一致的。( )

正确

[单选题]The experiment is carried cut to prove ______.

the pressure of air around us has a powerful force.

[单选题]的缘花为管状花，且为雌性。

蒿属

[单选题]AChristopher Thomas, 27, was a writer by night and a teacher by day when he noticed he was always tired and was losing weight fast. Diagnosed with diabetes(糖尿病), Thomas would need to inject himself with insulin(胰岛素) three times a day for the rest of his life or risk nerve damage, blindness, and even death. And if that weren't bad enough, he had no health insurance.

He has a positive attitude to this disease.

解析：

细节理解题。通读全文可知，Christopher Thomas对于自己的疾病采取了积极的态度，所以C项正确。A项与Thomas would need to inject himself with insulin(胰岛素) three times a day for the rest of his life不符；B项与文中的Thomas开办网站，与病人及其家属分享有关的信息和资源不符；D项提到的写作是Thomas的专职工作，而他的志愿工作才是运作Fight It 这个慈善机构。

[单选题]女贞花中仅有2枚雄蕊，称二强雄蕊。( )

错误

[单选题]花单性是进行异花传粉的必要条件。( )

错误