一机多票开票子系统V6.15中，以下关于向商品编码库中添加商品信息的方法描述中正确的是（）。
A.利用“系统设置/编码设置/商品编码”菜单或导航条中的商品编码快捷方式打开“商品编码设置”窗口，在其中添加商品信息
B.将商品信息编写成符合规定格式的文本文件，然后利用“商品编码设置”窗口中的“导入”按钮将文本文件导入到商品编码库中
C.在发票填开界面直接填写商品信息，在填开界面中点击“打印”按钮时系统会自动将其保存到商品编码库中
D.在发票填开界面调出“商品编码选择”窗口，然后利用窗口上的“增加”按钮向编码库中添加商品信息
参考答案：A, B, D
| 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. |
It is implied in the passage that ______ .
A．many scientists had known dinoflagellate before 1988
B．there had been no such organisms before 1988
C．many scientists were in doubt about the nature of the organism in 1988
D．no scientists knew anything about the organism in 1988