直流电机不发电的原因是什么？

Introduction: Speaking English is not only about using proper grammar. To use English effectively, you need to understand the culture in which it is spoken. Here are a number of important tips to remember when speaking English in the United States.
General Points to Remember Most Americans only speak English. While it is true that more and more Americans speak Spanish, most Americans only speak English. Don't expect them to understand your native language. Americans have difficulty understanding foreign accents. Many Americans are not used to foreign accents. This requires patience from both of you!	Conversation Tips Speak about location. Talk about work. Americans commonly ask "What do you do?" It's not considered impolite（as in some countries）and is a popular topic of discussion between strangers. Talk about sports. Be careful when expressing ideas about race, religion or other sensitive topics.
Addressing People Use last names with people you do not know. Always use “Ms.” when addressing women. Many Americans prefer first names. Americans prefer informal greetings and using first names or nicknames when speaking with colleagues and acquaintances.	Public Behavior Always shake hands. Look your partner in the eye. Don't hold hands: Same sex friends do not usually hold hands or put their arms around each other in public in the United States.

小题1:"When speaking to a stranger, ask them where they are from and then make a connection with that place”can be used as a supporting sentence to _____.

A．talk about sports	B．address people
C．talk about work	D．speak about location

小题2:If you are introduced to a woman called Pearl S. Buck, how should you address her usually?

A．What are you doing, Madam Buck?

B．How do you do, Ms. Buck?

C．How are you doing, Mrs. Pearl?

D．How are you, Miss Pearl S.?

小题3:The underlined word “acquaintance” in the table may probably mean______.

A．things that are precious

B．foreigners that you can talk to

C．persons who you are familiar with

D．languages that you can speak

小题4:We can infer from the text that ______.

A．smoking is allowed in public in the modern United States

B．different sex friends should hold hands during the first meeting

C．when you speak to others, it's polite not to look into their eyes

D．Americans shake hands when greeting the same sex friends