符合儿科病房要求的是()
A.A
B.B
C.C
D.D
E.E
参考答案:C
Many people are thinking of new ways to fight the pollution of the __________.
A.planet
B.universe
C.environment
D.galaxy
当事人一方的意思表示一旦为对方同意即成立的合同是()
A诺成合同
B实践合同
C有效合同
D无效合同