病情稳定的慢性病患者至少（）天记录一次病程。
A.3天
B.1天
C.2天
D.4天
参考答案：A
It is a strange phenomenon that some young people today think it is their parents’responsibility to earn money and_______ to spend it.
A．them
B．they
C．their
D．theirs
阀门规格Z44H25中H是（）。
A.结构型代号
B.连接型代号
C.阀门型代号
D.密封圈材质代号
