B
A study in September has added excitement in the brain science area. In the study, volunteers had electrical stimulation(电刺激) in their brains. The study found their memory(记忆) and problem-solving abilities got better for at least a month. The stimulation was painless and could lead to future treatments(治疗) for memory. It could even help students with their future exams.
Volunteers in the study did better in both remembering words and working out memory-based problems. In the test, they wore a cap and it was connected to electrical currents(电流). Wearing the cap for twenty minutes a day was enough to help people remember words better. The volunteers could retell more words a month later.
Working memory is connected to problem-solving and decision-making abilities. Low frequency(频率) stimulation of the brain can help
boost working memory. For example, volunteers also did better in taking notes after the stimulation.
The brain training industries are worth millions of dollars. Players are interested in improving their abilities by doing memory exercises. The future is wide open if it is tested to be successful and safe in treatments.
(
A
)29. According to Paragraph 2, who is likely to take the electrical shocks?
A. A man who wants to remember everything.
B. A boy who wants to make more friends.
C. A woman who loves wearing caps.
D. A girl who can solve problems quickly.
(
D
)30. The underlined word "boost" means "
" in the passage.
A. make something weaker
B. make something worse
C. make something harder
D. make something better
(
B
)31. What can we infer(推断) from the last two paragraphs?
A. The future of electrical stimulation is quite bright.
B. Lots of players show interest in brain training industries.
C. Low frequency stimulation didn't work on the volunteers.
D. The volunteers tested their working memory by taking notes.
(
C
)32. What is the main idea of this passage?
A. Working memory gets better when wearing caps.
B. Brain training industries cost millions of dollars.
C. The electrical stimulation helps people in memory.
D. All students want electrical stimulation for exams.