临时限速25km/h的调度命令已用IC卡输入LKJ，在列车在临时限速区

搜题请搜索小程序“爱下问搜题”

问题单项选择题

临时限速25km/h的调度命令已用IC卡输入LKJ，在列车在临时限速区段，当列车运行速度为（）km/h时，LKJ将实施常用制动。

A、25

B、26

C、28

D、30

答案

参考答案：C

情景交际

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

— Debbie! I can't believe it! I haven't seen you for ages.

— Dorothy! It's really a nice surprise! 1_____

— Pretty good.

— 2_____

— I wish I could, but I'm on my way out. I have to be in the city in an hour.

— 3_____

— There's a lot of traffic and I really have to get going. You know where I live-why don't you drop

in one evening?

— I'll do that. 4_____ Let's keep in touch.

— I'd really like to. I'll talk to you soon, Debbie. I'm glad I ran into you.

— 5_____

A. Take care.

B. How are you?

C. Where have you been?

D. Can you join me?

E. Come on, just for a minute.

F. And you should feel free to call or visit me.

G. It's been a whole year since we saw each other last time.

单项选择题

下列哪种细胞的机能活动与免疫反应无关（）。

A.B淋巴细胞

B.嗜酸性粒细胞

C.浆细胞

D.巨核细胞

E.肥大细胞