问题
单项选择题
涂装车间的空气压力对于外界环境应为( )。
A.负压
B.正压
C.平衡
D.气流流动
答案
参考答案:B
涂装车间的空气压力对于外界环境应为( )。
A.负压
B.正压
C.平衡
D.气流流动
参考答案:B
Mary is an American schoolgirl. 小题1: . She doesn’t know Chinese, but she is trying to study and speak it. 小题2: . Sometimes they don’t understand her, because she can’t speak Chinese well.It’s Saturday morning. Mary goes out. She is on her way to the park. She is going there to see a flower show(展览). 小题3: . She asks a Chinese boy. The boy can’t understand her. 小题4: . She draws flowers on it, gives the picture to the boy and says something about it. The boy smiles and then shows Mary the way to the park
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