下列实验操作中,不正确的是 [ ] A.实验完毕用嘴吹灭酒精灯 B.稀释浓硫酸时

题型:不定项选择题

问题:

下列实验操作中,不正确的是 [ ]

A.实验完毕用嘴吹灭酒精灯

B.稀释浓硫酸时,将浓硫酸缓慢注入水中

C.加热试管中的液体时,液体体积少于试管容积的1/3

D.用托盘天平称量时,把称量物放在左盘,砝码放在右盘

考点:化学实验操作的注意事项
题型:不定项选择题

列宁说:“我们原来打算直接用无产阶级国家的法令,在一个小农国家里按 * * 主义原则来调整国家的生产和产品的分配。现实生活说明我们犯了错误。”这一“错误”产生的根本原因是  [ ]

A.忽视了生产关系必须要适应生产力水平这一客观规律

B.第一次世界大战的影响

C.为了战胜国内外的敌人,巩固新生的苏维埃 * *      

D.过高估计人民的思想觉悟

题型:不定项选择题

按照现行土地利用现状分类,监教所用地属于()。

A.公共管理与公共服务用地

B.其它土地

C.商服用地

D.特殊用地

题型:不定项选择题

下述阴虚阳亢经行眩晕的主证中,哪项是错误的:

A.面色萎黄
B.经期头晕目眩
C.烦躁易怒
D.口干咽燥
E.月经量多色红

题型:不定项选择题

公证费用是指什么?

题型:不定项选择题

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.

(16)()

A.mistake

B.delay

C.change

D.wind

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