一般来说，与住宅小区配套的独立商业门面、繁华闹市及商业老街的商用房价格比较稳定且易于

某患者服用一种药酒后，出现面部肌肉僵硬，反射亢进，角弓反张等症状。

该中药所含的有毒化学成分有（）

A.马兜铃酸

B.三氧化二砷

C.马钱子碱

D.蟾酥碱

E.雷公藤苷

F.甘遂萜酯A

G.斑蝥素

H.士的宁

I.甘遂萜酯B

Parents who smoke often open a window or turn on a fan to clear the air for their children, but experts now have identified a related threat to children's health that isn't as easy to get rid of: third-hand smoke。

That's the term being   1  to describe the invisible yet poisonous mixture of gases and particles(颗粒) clinging(依附) to smokers' hair and   2 , not to mention cushions and carpeting, that stays long after second-hand smoke has cleared from a room. The remaining   3 heavy metals, carcinogens(致癌物) and even radioactive materials that young children can get on their hands and take in,   4 if they're crawling or playing on the floor。

Doctors from MassGeneral Hospital for Children in Boston coined the term "third-hand smoke" to   5 these chemicals in a new study that   6 on the risks they pose to infants and children. The study was published in the  7 issue of the journal Pediatrics。

"Everyone knows that second-hand smoke is bad, 8 they don't know about this," said Dr. Jonathan P. Winickoff, the lead author of the study and an assistant professor of pediatrics at Harvard Medical School。

"When their kids are   9 the house, they might smoke. Or they smoke in the car. Or they strap(用带子捆扎) the kid in the car seat in the back and crack the window and   10 , and they think it's okay because the second-hand smoke isn't getting to their  11 . We needed a term to describe these tobacco toxins that aren't  12 ."

The study reported on  13 toward smoking in 1,500 households across the United States. It found that the vast majority of both smokers and nonsmokers were   14 that second-hand smoke is harmful to children. Some 95 percent of nonsmokers and 84 percent of smokers  15 with the statement that "inhaling smoke from a parent's cigarette can   16 the health of infants and children"。

But   17 fewer of those surveyed were aware of the  18 of third-hand smoke. Since the term is so new, the researchers asked people if they agreed with the statement that "breathing air in a room   19 where people smoked yesterday can harm the health of infants and children"。

Only 65 percent of nonsmokers and 43 percent of smokers agreed with that  20 , which researchers interpreted as acknowledgement of the risks of third-hand smoke。

(    ) 1. A. told                 B. discussed   C. used                 D. mentioned

(    ) 2. A. shoes                      B. clothing     C. body                D. mouth

(    ) 3. A. includes           B. covers       C. finds                D. improves

(    ) 4. A. especially         B. specially    C. immediately      D. regularly

(    ) 5. A. name                      B. call           C. explain             D. describe

(    ) 6. A. focused            B. tended       C. tried                 D. worked

(    ) 7. A. later                 B. latest         C. best                  D. previous

(    ) 8. A. but                  B. and           C. however           D. or

(    ) 9. A. alongside          B. out of        C. in                    D. beside

(    ) 10. A. cough             B. talk           C. observe            D. smoke

(    ) 11. A. cars                B. seats          C. kids                 D. windows

(    ) 12. A. visible            B. invisible    C. poisonous         D. concrete

(    ) 13. A. policies          B. attitudes    C. bans                 D. habits

(    ) 14. A. told                B. content      C. confident          D. aware

(    ) 15. A. opposed          B. agreed       C. fought              D. connected

(    ) 16. A. harm              B. destroy      C. improve           D. confuse

(    ) 17. A. quite              B. very          C. far                   D. too

(    ) 18. A. chances          B. risks          C. abilities            D. conditions

(    ) 19. A. tomorrow       B. today               C. yesterday          D. weekend

(    ) 20. A. statement               B. mark         C. discussion         D. prejudice

全国对口支援新疆工作会议明确提出：要通过10年时间，最大程度地缩小新疆与内地差距，确保2020年新疆实现全面小康社会目标。为此，必须 [ ]

①着力增强新疆的自我发展能力 ②努力创造和谐稳定的社会环境 ③实现新疆民族地区的高度自治 ④动员组织全国力量促进新疆发展

A、①②③

B、②③④

C、①③④

D、①②④

下列标准中用于 100Mbps 快速以太网的标准是______。

A．802.7

B．802.8

C．802.9

D．802.3U

锅炉主蒸汽压力调节系统的作用是通过调节燃料量，使（）与（）相适应，以维持汽压的恒定。