A. an inadequate number of school buildings
B. old-fashioned facilities
Giải bởi Vietjack
Trường công lập những năm 1950 và 1960 đã phải đối mặt với tất cả các vấn đề sau TRỪ
A. một số tòa nhà trường học không đầy đủ B. cơ sở vật chất cũ lỗi thời
C. thiếu giáo viên D. số lượng học sinh giảm
Thông tin: Therefore, in the 1950's and 1960's, the baby boom hit an antiquated and inadequate school system.
Tạm dịch: Do đó, trong những năm 1950 và 1960, sự bùng nổ của trẻ em đã đánh vào hệ thống trường học quá cũ và không đầy đủ.
Chọn D
The example “You cant make a silk purse out of a sows ear” is used to...
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Pollution is a threat to many species on Earth, but sometimes it can cause species to thrive. Such is the case with Pfiesteria piscicida. A one-celled creature called a dinoflagellate, Pfiesteria inhabits warm coastal areas and river mouths, especially along the eastern United States. Although scientists have found evidence of Pfiesteria in 3,000-year-old sea floor sediments and dinoflagellates are thought to be one of the oldest life forms on earth, few people took notice of Pfiesteria.
Lately, however, blooms – or huge, dense populations – of Pfiesteria are appearing in coastal waters, and in such large concentrations the dinoflagellates become ruthless killers. The blooms emit powerful toxins that weaken and entrap fish that swim into the area. The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh. Often the damage is astounding. During a 1991 fish kill, which was blamed on Pfiesteria on North Carolina’s Neuse River, nearly one billion fish died and bulldozers had to be brought in to clear the remains from the river. Of course, such events can have a devastating effect on commercially important fish, but that is just one way that Pfiesteria causes problems. The toxins it emits affect human skin in much the same way as they affect fish skin. Additionally, fisherman and others who have spent time near Pfiesteria blooms report that the toxins seem to get into the air, where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment.
For a while, it seemed that deadly Pfiesteria blooms were a threat only to North Carolina waters, but the problem seems to be spreading. More and more, conditions along the east coast seem to be favorable for Pfiesteria. Researchers suspect that pollutants such as animal waste from livestock operations, fertilizers washed from farmlands and waste water from mining operations have probably all combined to promote the growth of Pfiesteria in coastal waters.
What is true of Pfiesteria?
The word “astounding” in the passage is closest in meaning to _______.
Compared to preindustrial times, the number of hours in the workweek in the nineteenth century
