问题
单项选择题
（）是指经营性国有投资项目，由建设项目法人对项目的策划、资金、筹措、建设实施等实行全过程负责的一种项目管理制度。
A.建设项目法人责任制
B.建设项目资本金制
C.建设项目招标投标制
D.合同制
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
（）是指经营性国有投资项目，由建设项目法人对项目的策划、资金、筹措、建设实施等实行全过程负责的一种项目管理制度。
A.建设项目法人责任制
B.建设项目资本金制
C.建设项目招标投标制
D.合同制
参考答案：A
| 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. |
The word "they" underlined in Paragraph 1 refers to ______ .
A．organisms
B．fish
C．toxins
D．flesh