下列尺寸最有可能是托幼建筑楼梯踏步宽度的是()。
A.350mm
B.320mm
C.300mm
D.280mm
参考答案:D
May I ask __________ a question?
A. they
B. them
C. their
D. theirs
与海藻相反的药物是
A.乌头B.昆布C.大枣D.甘草E.细辛