混合操作时不可随意提高转速，防止（）。 A.电机超负荷 B.桨叶断裂 C.物料飞溅

下面各句中表述没有错误的一项是（     ）（3分）

A．本届巴西世界杯将在192个国家和地区通过电视转播，预计观众人数大约32亿人左右。

B．能否帮助孩子们树立正确的人生观，是使他们走向美好生活的关键。

C．湖南衡阳一军械仓库发生爆炸事故，17名官兵遇难，网民希望有关部门能彻查原因，杜绝此类事故不再发生。

D．一位双腿瘫痪的残疾少年，通过脑电波控制的机器外骨骼，踢出本届世界杯第一脚球，这成为开幕式最令人感动的瞬间。

影响销售渠道选择的因素有( )。

A．产品因素

B．市场因素

C．企业因素

D．国家法律约束

E．中间商的特性

收入的特征表现为( )。

A．收入会导致所有者权益的增加

B．收入包括代收的增值税

C．收入从日常活动中产生，而不是从偶发的交易或事项中产生

D．收入与所有者投入资本无关

I have nothing to say about whether or not “A Day Without Immigrants(移民)” had a positive or negative effect on the question of how the federal government should deal with the huge population of undocumented illegal immigrants in this country. I'll leave that question to others.

Regardless of how you feel about the event, one conclusion is obvious. Using the theme of “A Day Without” as a way to focus national attention on a particular subject is a great idea, and could serve as a method for increasing public consciousness about other issues that affect daily life in America. Here are my top three examples:

“A Day Without Speeding.” How hard could this be? If all drivers would strictly obey every posted speed limit on highways, downtown, on neighborhood streets, and in parking lots for one 24-hour cycle, the benefits would be huge.

“A Day Without Losing Your Temper.” A higher degree of difficulty here, and I know that from personal experience. When something goes wrong at home or on the job, there may be brief satisfaction in yelling or kicking the furniture, but bursting into anger usually has nothing to do with the approach to the heart of the matter.

“A Day Without Having All The Answers.” I would like to get a break from hearing anyone speak the phrase, “Here’s what you’re doing wrong.” Right now the US is packed with citizens who believe they can point out the cause of every single problem in existence and then solve it in a moment. I believe they need to be quiet sometimes and use their ears instead of their voices.

I wonder how would average Americans react to such a national pause? Would it be a day of reaction against anger, or joyful celebrations?

小题1:The first paragraph suggests ________.

A．the writer is against “A Day Without Immigrants”

B．immigrants are not equally treated by the US government

C．the immigrants issue is so complex that the author has to refer to others

D．some move to America without the permission of the US government小题2:The author uses his “top three examples” to________.

A．criticize the undocumented illegal immigrants in America

B．show public consciousness of some subjects could be raised

C．encourage common people to create more similar activities

D．indicate some bothering issues affecting people’s daily life小题3:According to the author, losing one’s temper is ________.

A．unpleasant

B．pointless

C．relaxing

D．personal小题4:The writer suggests “a day without having all the answers”, because ________.

A．he thinks the Americans are too proud

B．he wants to have a chance to speak his mind

C．he expects others to keep quiet and calm

D．he hopes to get a break from the problems

下面列出的四种存储器中，易失性存储器是______。

A．RAM

B．ROM

C．PROM

D．CD-ROM