题目内容

直流电动机的起动方法有（）和()两种

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直流电动机反转通常采用改变电枢电流方向来实现。

A. 对
B. 错

Choose a situation to form a dialogue. You can edit it yourself, or learn from the text on the PPT. Read it fluently, and then upload the recording.

Reading the following dialogue and write T(Ture) or F(false) in the blanks below.(B：Betty M: Man. The opening day of the two-day conference has arrived. Betty is at the registration desk to welcome visitors)B:Good morning. Are you here to register for the conference?M: Actually, I have already pre-registered for the event.B:May I have your name, please?M: Sure, It's Anders.B:Excuseme, is that your surname or your given name?M:It's my last name. My first name is Lance.B:Mr. Anders... oh, yes, I see your name on the list. Here is our information package.M: Thanks. I'm most interested in the speech by william Rutherford,B:Yes, that should be an excellent presentation. Let me just check on the details for you...OK, it's at 2 p.m. in Ballroom C.M:Where can I find Ballroom C?B:It's very easy to find. You just go up the stairs on your left, and it's the second set of doors on your right.M:Thank you for all your help.B:My pleasure, Mr, Anders. I hope you enjoy the conference. 1. The man's family name is Lance. 2. The man registered for the conference in advance. 3. The man asks Betty where William Rutherford is from. 4. Betty didn't know where is Ballroom C. 5. The man will later go upstairs.

Read the following dialogue and write T (Ture) and F(false) on the blanks below.(B：Betty M: Man//. Adam and Betty are forced to deal witha sudden change to the conference).B: Adam, have you heard about the problem?One of the leaders for our afternoon seminar can't make it. He's sick.A:What? Well, it's a good thing we have a contingency plan.I've got a list of people on standby who can fill as seminar leaders on virtually a moment's notice.B:We'd better call people on that list right away to make sure we can find someone available.A: Sure. I'll get on that right away.Are there any other last-minute changes that need to be taken care of?B: Well, as far as I know, everything else is going according to plan.A: That's good. OK, I should call some people about the seminar.Hey, what is that pipe doing sticking out of the wall like that?B: I hadn't noticed that. We've got to get rid of this safety hazard.I'll call the hotel's maintenance department and ask them to take care of itWrite T(Ture) or F(false) in the blanks below._ 1. Betty says the keynote speaker will be late for the event. 2. Adam asks Betty to call the keynot speaker to come here on time. 3. Betty says she noticed a pipe sticking out of the wall earlier. 4. Betty believes the pipe could be dangerous.__ 5. Betty'll call the hotel's maintenance department and ask them to take care of it