（）气体中毒属于煤矿中常见的有毒性气体。 A.CO和H2S B.CH4和N02 C.

为了冬季采光，居住区规划设计标准对不同纬度带的住宅的合理间距有明确规定。分析下表（表中H是住宅的高度），回答问题。

我国部分城市住宅的日照间距
城市	冬至正午 太阳高度	日照间距
		理论	实际采用
①	24045’	2.02H	1.7H
②	40028’	1.18H	1.2H
③	35021’	1.41H	1.1—1.2H
④	26036’	1.86H	1.6－1.7H

小题1:表中的四个城市所处纬度从低到高依次是（   ）

A．①②③④　　

B．①④③②　　

C．②①③④　　

D．②③④①小题2:根据表中信息，在北京修建两栋20米高的住宅楼，其理论日照间距约为（   ）

A．23米

B．28米

C．37米

D．40米

对于连年灌水的新栽树木全年灌水次数不应少于（）次。

A.3

B.4

C.5

D.6

社会保险是通过国家立法在全体国民或部分国民中强制实行的，而商业保险主要依靠商业原则来经营，是一种契约关系。
这段话主要支持的观点是( )。

A．社会保险和商业保险不宜交叉经办
B．社会保险和商业保险可以交叉经办
C．统一社会保障的管理机构和政策比较好
D．应加强社会保险和商业保险中的法制化

实际工作中，无论是设置三栏式还是多栏式，一般还应在银行存款日记账的适当位置增加一栏“结算凭证”。

Questions 81-90 are based on the following passage. It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too. The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte- literally, "fish killer. " It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding. Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them. Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation. To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack.

All the following names are used to describe the organism EXCEPT ______.

A．dinoflagellate

B．Pfiesteria piscimorte

C．killer algae

D．a science fiction