下图是甲骨文的“年”字，该字由两部分组合而成，上部为“禾”。卜辞中常见“有年”、“大有年”的记载。据此，“有年”的意思应是
A．人寿年丰
B．祈盼丰收
C．庄稼收获
D．祭祀谷神
答案：C
题目分析：本题主要考查学生识图、推理的能力，从图片中“年”字的构成为“禾”，可以缩小选择的范围，A项与此没有联系故可以排除；从B、C、D中选择，根据卜辞中常见“有年”“大有年”的记载，可以推测出“有年”即“丰收之年”，“大有年”应该是“大获丰收”的意思；而B、D虽与收获有关，但与材料的主题意思还有一定差距，故选C。
| 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. |
Which of the following does the writer explain
A．Neurotoxins.
B．Microscopic organisms.
C．Predators.
D．Fish walks.