对于塑料的缺点及使用局限下面讲的正确是（）。A、塑料吸湿性大，容易发生水解老化 B

生态学的一般规律包括以下各项中的（）方面。

A.相互依存相互制约、微观与宏观协调发展、物质循环转化再生、物质输入、输出的动态平衡、相互适应与补偿协同进化、生态系统的无限调节能力

B.相互依存制约、历史循环、微观与宏观协调发展、物质循环转化与再生、物质输入输出的动态平衡、环境资源有限规律

C.相互依存相互制约、微观与宏观协调发展、物质循环转化与再生、物质输入、输出的动态平衡

D.相互依存相互制约、微观与宏观协调发展、物质循环转化与再生、能量守恒、社会均衡

处方药广告的忠告语是（）。

A.请遵守医嘱使用

B.请按药品说明书或在药师指导下购买和使用

C.凭医师处方销售、购买和使用

D.本广告仅供医学药学专业人士阅读

E.注意：过量使用本品有害健康

Betty didn't come to school yesterday ______ she was ill.[ ]

A. but    

B. than  

C. if    

D. because

2007年中 * * 在给内蒙古自治区政府成立60周年的贺电中写道：“内蒙古自治区的成立，是中 * * 党把马克思主义的基本原理同我国民族实际相结合的一个伟大创举。”这里的“伟大创举”是指( )

A．率先推翻了封建统治

B．率先完成民主改革

C．率先实行民族区域自治

D．率先走上社会主义

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

What was the percent decrease in the price of MegaTek (MGTK) stock during the market decline of March 1, 2001, to March 1, 2002 ？（）
(1) The price of MGTK was $56.20 on March 1, 2001.
(2) The price of the stock on January 1, 2002, was only one-quarter of its price as of March 1, 2001.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.