两条异面直线在平面上的投影不可能是（ ） A．两个点 B．两条平行直线 C．一点和一条

估价中的最高最佳使用具体包括( )等。

A．最佳用途

B．最佳位置

C．最佳规模

D．最佳集约度

E．最佳环境

走近名著（名篇）。

　　三年来，同学们阅读了不少的课文和名著，认识和了解许多人物和事物。请根据你对课文和名著的阅读和理解情况，仿照例句，在下面的横线上填写恰当的词语或短语表达自己的看法或见解。（任选两题作答）

示例：读《孔乙己》，我认识了好逸恶劳、穷困潦倒、受尽凌辱的孔乙己。

读《安塞腰鼓》，我了解了热情奔放、气势恢弘的安塞腰鼓。

（1）读《水浒传》，我认识了__________（人物）；

（2）读《海底两万里》，我认识了__________的海底世界；

（3）读《故宫博物院》，我了解了__________的故宫。

X18仪表出现以下哪种故障现象时，说明通讯不正常，检查通讯线路，确保通信正常。（）

A、仪表右上角四位数第一位为“0”

B、仪表右上角四位数第一位为“1”

C、仪表右上角四位数第一位为“2”

D、仪表右上角四位数第二位为“0”

直流电动机的感应电势（E）因其方向与电流的方向（），故称为反电势.

Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

（30）（）

A．health

B．safety

C．joy

D．future