将稀盐酸慢慢滴入装有氢氧化钠溶液的烧杯中,用温度计测出烧杯中溶液的温度,溶液温度

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问题:

将稀盐酸慢慢滴入装有氢氧化钠溶液的烧杯中,用温度计测出烧杯中溶液的温度,溶液温度随加入稀盐酸质量增加而发生变化,如下图所示。有关叙述中错误的是

A.b点表示氢氧化钠和盐酸恰好完全反应

B.c点表示反应所得溶液中溶质只有NaCl

C.从a到b过程中,烧杯中溶液的pH逐渐增大

D.稀盐酸与氢氧化钠溶液发生的反应是放热反应

考点:中和反应及在实际中的应用酸的性质碱的性质
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某男,56岁。因情急恼怒而突发头痛而胀,继则昏厥仆倒,不省人事,舌红苔黄,脉弦。其病机是()

A.气郁

B.气结

C.气脱

D.气陷

E.气逆

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患者胆固醇升高,除高脂血症外还应考虑哪些疾病?

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当被测压力p≤pmin时,电接点压力表的()。如果在电路上接入继电器也可以实现对压力的控制。

A.低压报警器工作

B.高压报警器工作

C.上下限报警器均不工作

D.上下限报警器均工作

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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.

It can be inferred that without gravity______.

A.buildings and other structures would float away

B.trees and buildings would not easily fly off

C.something around your head would not fly away

D.everything outside buildings would fly off into space

题型:选择题

DQ600/1000.30堆取料机型,其堆料能力为:()。

A.1000吨/小时

B.600吨/小时

C.30吨/小时

D.无法判断

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