第一次世界大战结束的根本原因是______。 A．世界大国联合起来 B．各交战国人

“工业反哺农业、城市支持农村”的趋向，是在哪个阶段开始出现的？（）

A.工业化初始阶段

B.工业化中期阶段

C.工业化后期阶段

D.工业化全过程

Passage Four

Read the passage below and then do the exercises that follow.

If a Mecca exists for today’s youth, it must take the form of a rock concert. Such a colossal event draws people from surprisingly distant places and from oddly diverging lifestyles. The sophisticated college student may be seated next to the wide-eyed junior high cheerleader, the latter showing fright at the approach of a wild-eyed freak. How do these incompatible character types find a mutual appeal in rock concert What induces young people to exchange the few dollars earned through babysitting or car washing for a concert ticket

To many, the answer is immediately obvious—the music is the source of appeal at a concert. The quality of the sound produced, however, frequently casts doubt on this explanation. Unquestionably, rock concertsare loud ; the decibel level of some reportedly exceeds that attained by a jet plane on takeoff. In addition, this aural assault is often intensified by an out-of-tune guitar, by the faltering voice of the performer, or by the bad acoustic in the concert hall. Rock groups generally correct these problems in a studio; their recordings may even boast pleasing harmonies with intelligible lyrics. So why do we battle crowds to secure choice seating at a concert creates a magical, otherworldly atmosphere, reminiscent of a childhood never-never land. An eerie darkness shrouds the hall, and then, just as in our favorite fairy tale, the supernatural being( otherwise identified by the vulgar term, "rock star") appears in a burst of light. In another context he would have been known as a" god out of the machine. " Bizarre lighting schemes and gimmicks such as mock hangings or fire-breathing contribute to the atmosphere of other-worldliness in some acts. The fans are permitted only a glimpse of the star before he vanishes once more in the darkness, only to materialize the following evening in a concert hall hundreds of miles away. The stage becomes the rock star’s only natural habitat; for us, he can have no existence apart from it. We can scarcely conceive of our idols performing such mundane activities as going to the dentist, shopping for tuna fish, or changing the baby, perhaps we have a need to believe in an illusory creature of the night, somehow different from ourselves. Who fits this description better than a rock star

Referring to this passage, what is the presumed reason for the popularity of rock concerts and rock stars What alternative explanation does the author give in the passage ？

费者由于对某些商品或某家商店信赖、偏爱产生经常、反复购买，是消费者行为（）类型。

A.习惯型

B.理智型

C.经济型

D.冲动型

关于逃生工具，以下描述正确的是（）。

A.逃生工具可以从H3C网站上下载

B.逃生工具支持802.1x认证方式和Portal认证方式

C.逃生工具仅检测用户名和密码，不做授权、绑定的判断，也不做安全检查

D.逃生工具仅支持在Windows操作系统下安装

测风时，将风表记数器指针回零，待风表叶轮转动（）左右后，再进行风速测定。

A、30秒

B、50秒

C、10秒

D、60秒