66
(direct) from human stem cells. He developed
67
special technique to create a chemical environment similar to that in our bone marrow (骨髓). This environment encourages stem cells to develop fully
68
red blood cell.
According to Turner, his artificial blood is
69
(likely) to contain disease viruses or produce side effects. And the best part is that
70
he managed to produce was type O- blood. Not only is it a rare blood type, it’s also a universal type, which means it can be transfused into any patient.
Passage 4
A recent study suggested that taking a bottle of water into the exam hall could help students improve their grades.
According to the study those who brought drinks,
61
(especial) water, with them when sitting their exams performed up to 10 per cent better than those who did not.
Comparing their exam results with their normal schoolwork grades, scientists then found that all those who
62
(bring) drinks with them got better grades
63
between 2 and 10 percent.
It is unclear
64
drinking water improves exam results. But scientists say having enough water in our bodies and not feeling thirsty could have a
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