题海让大学四年没有难题
白天模式登陆

题目详情

单选题 It is essential that the glass ________ thicker on the outside than on the inside and the gap between the panes of glass ________ a minimum of seven centimeters

A. is, is

B. be, be

C. be, is

D. is, be

大学英语II课程封面

学科:大学英语II

时间:2024-05-03 04:03:56

Copyright © 2022 津ICP备2021001502号