以下说法正确的有： 查看材料A.I、Ⅱ和ⅢB.I和ⅡC.Ⅱ和ⅢD.I和Ⅲ

根据以下答案，回答题

A．I

B．X

C．A

D．T

E．U

通常不存在于RNA中的碱基是（）。

查看材料

根据以下材料，回答题

某药品生产企业研发出的新药经批准后进入了临床试验阶段

验证药物对目标适应症患者的治疗作用和安全性，评价利益与风险关系，最终为药物注册申请的审查提供充分依据的是 查看材料

A.I期临床试验

B.Ⅱ期临床试验

C.Ⅲ期临床试验

D.Ⅳ期临床试验

心绞痛的严重程度分级是 查看材料

A.I级

B.Ⅱ级

C.Ⅲ级

D.Ⅳ级

E.无法分级

_________ 查看材料

A.I caught a bad cold last week.

B.All you need now is a good， long rest.

C.Have you seen the doctor？

D.I don"t want to give the bug to anyone in the office.

_________ 查看材料

A.I like a good story.

B.They still make movies like that.

C.People today don" t like that.

D.I agree with you.

A.I、Ⅱ

B.I、Ⅳ

C.Ⅱ、Ⅲ

D.Ⅲ、Ⅳ

Where were shells used as money in history？ 查看材料

A.In the Philippines.

B.In China.

C.In Africa.

D.We don" t know.

A.I"m not so easily tempted into doing something that I think is wrong.

B.I" d better not.

C.I can hardly choose from.

D.What choices you have!

James 查看材料

A.I prefer physical books to e-books.

B.E-books are environmentally friendly.

C.The market for physical books is shrinkin

D.What counts is not how but how well you rea

E.E-reading will benefit， rather than harm， publishers.

F.The price of hardcover books will be greatly lowere

G.Non-bookstore outlets add to the growth of physical books.

Alex 查看材料

A.I prefer physical books to e-books.

B.E-books are environmentally friendly.

C.The market for physical books is shrinkin

D.What counts is not how but how well you rea

E.E-reading will benefit， rather than harm， publishers.

F.The price of hardcover books will be greatly lowere

G.Non-bookstore outlets add to the growth of physical books.