尿瘘术后留置尿管的时间是()。
A.1~2天
B.3~4天
C.5~6天
D.1~2周
E.4周
参考答案:E
榨菜是用______腌制而成的制品,为世界三大腌菜之一。
A.根用芥菜
B.茎用芥菜
C.芜菁
D.球茎甘蓝
Mark needs to learn Chinese ______ his company is opening a branch in Beijing.
A.unless
B.until
C.although
D.since