已知a+b=4,x+y=10,则a2+2ab+b2-x-y的值是( ) A.6

题型:选择题

问题:

已知a+b=4,x+y=10,则a2+2ab+b2-x-y的值是(  )

A.6

B.14

C.-6

D.4

考点:完全平方公式
题型:选择题

A 2-week postpartum client inquires about alcohol use during lactation. She tells the nurse she has heard that a small glass of wine or beer before nursing will increase her milk supply and be good for the baby. What’s the nurse’s best response

A. "It’s true that a little alcohol before breast-feeding will help your milk supply because it will help you relax. "
B. "Research has shown that it actually decreases the amount of milk the baby will get, perhaps because it affects the taste of your milk. "
C. "A little alcohol will help you to relax and the small amount that will pass through the milk may just help the baby relax. "
D. "You shouldn’t even consider drinking alcohol while you are nursing a baby. "

题型:选择题

肺结核空洞可分为()

A.薄壁空洞

B.虫蚀样空洞

C.干酪溶解性空洞

D.纤维厚壁空洞

E.净化空洞或开放性愈合空洞

题型:选择题

简述脊髓损伤后截瘫患者的转移训练。

题型:选择题

向50mL18mol/LH2SO4溶液中加入足量的铜片并加热。充分反应后,被还原的H2SO4的物质的量  (   )

A.小于0.45mol

B.等于0.45mol

C.在0.45mol和0.90mol之间

D.大于0.90mol

题型:选择题

某轮装运自重100t的圆柱形重件一件,重件上有8个2.5×1m2的木墩,拟将此重件装在上甲板(单位面积允许负荷量为2.0t/m2),则要使上甲板强度满足要求,至少应再加相同的木墩()个。

A.12

B.16

C.20

D.22

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