We should not rely on pocket calculators because ______.[A] they are not clever as our brains [C] they are harmful to our brains[B] we need to use our brains to prevent it from shrinking [D] we could not get enough practice on mathematics A: We should not rely on pocket calculators because ______. B: they are not clever as our brains C: they are harmful to our brains D: we need to use our brains to prevent it from shrinking [D] we could not get enough practice on mathematics

According to Dr. Ramscar, why do our brains "slow down" as we get older? A: Our ability to process new and old information declines B: Our brains go into steady decline C: We have more information, so it takes longer to process it D: Older brains are more forgetful than younger brains are

（ ） to lead is known to damage the brains of young children.

The doctor's tests show that ______. A: our brains shrink as we grow older B: the front section of the brain does not shrink C: sixty-year-olds have better brains than thirty-year-olds D: some people’s brains have contracted more than other people’s

So what have we done to their little brains

中国大学MOOC: Those of you who use your brains to navigate these challenges, put your hands down. Kish says we all use our brains to find .

The small plastic chip will help people whose brains . (damage)

Those of you who use your brains to navigate these challenges, put your hands down. Kish says we all use our brains to find . A: problems B: solutions C: / D: /

It has been proved what the brains of men and women are not entirely the same.

Mr. Smith was the brains ________ the big project. A: behind B: of C: about D: on