皮皮学，免费搜题
登录
搜题
【单选题】
Section B Directions: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. The dialogues and questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D. 听力原文：M: John was half an hour late for work this morning. W: But it's nothing new for him. Q: What can we learn about John? (6)A.
He is often late.
B.
He used to be on time.
C.
He is never late.
D.
He is always on time.
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
【简答题】枝角类有 生殖 和 生殖 两种生殖方式。
【多选题】关于约束反力的说法,正确的是:
A.
约束反力的方向总是与非自由体所限制的运动方向相反。
B.
约束反力的大小不能预先独立确定，需要求解计算。
C.
约束反力的作用是约束和非自由体的接触点。
D.
约束反力与约束种类和性质无关。
【简答题】约束反力的作用点是约束与非自由体的(),反力的方向总是与该约束所能限制的运动方向()
参考解析：
知识点：
题目纠错 0
发布
