皮皮学，免费搜题
登录
搜题
【判断题】
要使有相当量的液体沿柱流回烧瓶中,即要选择合适的回流比,使上升的气流和下降液体充分进行热交换,使易挥发组分量上升,难挥发组分尽量下降,分馏效果更好。A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】for your help, would never have been able to get over the difficulties.
A.
Would still have been
B.
If it were not
C.
Had it not been
D.
If we had not been
【简答题】Mon père me montre la voiture que nous ____________ acheter.
【单选题】Thanks for your kind help! We would have _________ lost the game!
A.
otherwise
B.
or
C.
then
D.
therefore
【简答题】计算下图无侧移刚架汇交于同一结点 D 处各杆杆端的分配系数。
【单选题】Thanks for your kind help! We would have _________ lost the game!
A.
therefore
B.
or
C.
otherwise
D.
then
【简答题】Cuando me ______ (dar, impersonal) la visa, iré a reservar el pasaje.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
