劳动合同依法定立即具有( ),当事人必须履行劳动合同规定的义务。
A.指导性
B.效力
C.合同效力
D.法律约束力
参考答案:D
There aren’t enough chairs. Would you please _________ ones here?
A.to bring another three
B.bring more three
C.to take three other
D.bring three more
精癃好发于男性的()
A.青年
B.中年
C.老年
D.儿童
E.幼儿