根据联合国《销售合同公约》规定:如果合同中未具体规定买方是按净重还是毛重支付货价,且双方已就标的物的计量方法发生疑问时,买方可以按()支付货款。
参考答案:货物净重
The house could fall down soon if no one ______ some quick repair work.
A. has done
B. is doing
C. does
D. had done
增强呋喃妥因在泌尿系的抗菌活性:
A.酸化尿液B.碱化尿液C.二者均需D.二者均不需