43. A ____ in the hand is worth two in the bush. (prov.)
A.bird
B.pigeon
C.eagle
D.Sparrow
A
下列各式对不对?如果不对,应当怎样改正?
(1)(x7)3=x10;
(2)x7•x3=x21;
(3)a4•a4=2a8;
(4)(a3)5+(a5)3=(a15)2.
临床上的多尿是指24h尿量
A.>3000ml
B.>1000ml
C.>2500ml
D.≥>2500ml
E.>1500ml