实验室配制50克5%的NaCl溶液，应称取 ______克NaCl倒入干燥、洁净的烧杯里，然后用 ______量取 ______毫升水，倒入盛有NaCl的烧怀里，并不断用 ______搅拌，使NaCl完全溶解，即得所需溶液．

A 24-year-old primipara decides to breast-feed her baby but says, "I'm worried that I won't be able to breast-feed my baby because my breasts are so small. " Which of the following is appropriate response by the nurse

A．Because her breasts are small, she will have to feed the baby more often.

B．Breast size poses no influence on a woman's ability to breast-feed a baby.

C．Breast milk can be enhanced by occasional formula feeding.

D．The woman's motivation to breast-feed is less important than breast size.