問題詳情
1 Before the product is put on the market, the company must ....... whether it complies with safety standards.
(A) ask
(B) calculate
(C) ascertain
(D) argue
參考答案
答案：C
難度：適中0.571429
統計：A(1),B(7),C(12),D(1),E(0)
用户評論
【Amy Tsai】評論
(C) ascertain (v.) 查明；確定；探知；弄清。