不是改善胎儿窘迫缺氧状态的护理措施是()。
A.氧气吸入
B.每30分钟听胎心音一次
C.每15分钟听胎心音一次
D.做好新生儿抢救准备
E.做好手术准备
参考答案:B
已知定义域在R上的函数f(x)满足f(x+y)=f(x)+f(y),且当x>0时,f(x)>0,
(1)求f(0).
(2)判断函数的奇偶性,并证明之.
(3)解不等式f(a2-4)+f(2a+1)<0.
My father ___________live in the country. But now he _______living in the city.[ ]
A. used for, is used to
B. is used to , used to
C. use, used to
D. used to , is used to