关于颅骨的发育，下述哪项错误（） A.颅缝闭合时间为生后6～8周 B.后囟在出生时已

对人来说，血液中各种血细胞数量越多越好．______．

2011年7月7日，美国《财富》杂志发布了2011年世界500强排行榜，在上榜的69家中国大陆公司中，国企占了38家，显示国企在2011年的良好发展势头，材料表明，国有经济[ ]

A．是社会的经济制度基础

B．控制着国民经济的命脉

C．在我国经济中占主体地位

D．拥有雄厚的经济实力

土壤中的硫酸盐还原菌可将硫酸盐还原成（）

A、有机硫

B、单质硫

C、硫化亚铁

D、硫化氢

The foreign minister would reveal nothing about his recent tour of the Middle East beyond what had already been announced at the press conference.()

A. as for

B. in addition to

C. along with

D. in relation to

The nurse is caring for a client infected with methicillin-resistant Staphylococcus aureus (MRSA). What’s the major infection control measure to reduce MRSA and other nosocomial pathogens in a health care setting（）

A. Using antibacterial soap when bathing clients with MRSA.

B. Conducting culture surveys periodically.

C. Ensuring that personnel wash their hands before and after contact with every client.

D. Using specific housekeeping practices for environmental cleaning.