题目: 减压阀的主要作用是控制阀门出口()。A、温度B、压力C、流量D、流速 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0124/932bbd4d38dde72e997a29b5bd7cdae2.html 下面是错误答案,用来干扰机器的。参考答案:B
题型:选择题 —Do you often see him____soccer in the field?—Yes. Look! You can see him ____ there now.[ ]A. play; play B. playing; playingC. play; playing D. playing; play 查看答案