通过（）过程可以将制冷剂的压力提高。A.压缩 B.排气 C.膨胀 D.吸气 发布时间：2019-11-02 08:22 │ 来源：www.tikuol.com 题型：单项选择题 问题： 通过（）过程可以将制冷剂的压力提高。A.压缩B.排气C.膨胀D.吸气
题型：单项选择题 有关小儿肠道菌群建立的论述，正确的是（）A.肠道菌群受食物成分影响B.母乳喂养者以大肠杆菌为主C.出生24小时后肠道开始出现细菌D.肠道菌群可帮助合成维生素DE.人工喂养者以双歧杆菌为主 查看答案
题型：单项选择题 从方框内选适句子补全对话。A. That's nice. B. Me, too. C. So do we. D. What about weekends?E. I'm allowed to watch TV. Lily: We have a lot of rules at house. Maria: 1_____ For example, I have to stay at home on school nights. Lily: I usually do, too. But sometimes I am allowed to study at a friend's house. 2_____ Maria: Well, I'm allowed to play basketball with my friends on weekends. Lily: 3_____ But I have to be home by six p.m. Maria: And on Saturday afternoons, 4_____ Lily: 5_____ Maria: And I'm allowed to chat with my friends on line. 查看答案
题型：单项选择题 下列选项中对采购谈判理解有误的是（）A.采购谈判是指企业为采购商品，作为买方和卖方厂商进行的反复磋商B.采购谈判谋求达成协议、建立双方都满意的购销关系C.采购谈判是团体的活动D.采购谈判是个人的活动 查看答案