问题
单项选择题
运行中变压器油的界面张力值(25℃)在()mN/m时,表明油中已有油泥生成的趋势。
A.≤19;
B.19~25;
C.27~30;
D.≥35。
答案
参考答案:C
运行中变压器油的界面张力值(25℃)在()mN/m时,表明油中已有油泥生成的趋势。
A.≤19;
B.19~25;
C.27~30;
D.≥35。
参考答案:C
补全对话。(有两项多余)(5分)
Boy: Oh, wow! You are Paula, aren’t you? Girl: ____2___ Boy: But you used to be really quiet, didn’t you? Girl: Yeah. ____3___ Boy: No, you weren’t. But you were always friendly. Wait a minute! ___4___ Girl: Yes, I did. But now I am more interested in sports. I play soccer and ___5___ Boy: Wow! People sure change. |