下列关于化学反应速率的说法错误的是[ ] A．化学反应速率是用于衡量化学反应进行

发布时间：2017-04-12 21:27 │ 来源：www.tikuol.com

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问题：

下列关于化学反应速率的说法错误的是[ ]

A．化学反应速率是用于衡量化学反应进行快慢的物理量

B．决定化学反应速率的主要因素是反应物本身的性质

C．可逆反应达到化学平衡状态时，反应停止，正、逆反应速率都为零

D．增大反应物浓度或升高反应温度都能加快化学反应速率

考点：影响化学反应速率的因素化学反应速率的定义、公式

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阅读理解。

     Six people were travelling in a compartment (车厢) on a train. Five of them were quiet and polite but
the sixth was a rude (粗鲁) young man. He was always making a lot of trouble.
     At last this young man got out at a station with two heavy bags. None of the other travelers helped him
but one of them waited the rude young man was very far away. And then opened the window and shouded to
him "You left something behind in the compartment." then he closed the window again.
     The young man turned around and hurried back with his two bags. He was very tired when he arried but
he shouted through the window "What did I leave behind?"
     As the train began to move again, the traveler opened the window and said, "A very bad impression
(印象)."

1. The young man was _______ in the compartment to get off the train.

A. the first
B. the second
C. the third
D. the last

2. One of the travelers _______ before he was very far away.

A. had shouted to the young man
B. didn't shout to the young man
C. opened the window
D. closed the window

3. The other travelers in the compartment _______ the young man.

A. were friendly
B. were not friendly to
C. were pleased with
D. were surprised at

4. The young man had _______ with him.

A. more than two bags
B. just two bags
C. two bags and something else
D. two more bags.

5. The young man returned _______.

A. just before the train moved again
B. as soon as the train moved
C. just after the train moved again
D. when the train began to move

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长期从事汞作业男工，具有神经衰弱症状，舌、眼睑轻微震颤，伴口腔炎、尿汞升高等症状，可以诊断为(　　)。

A．汞吸收

B．慢性中度汞中毒

C．慢性轻度汞中毒

D．急性汞中毒

E．慢性重度汞中毒

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血管内皮细胞分泌的促止血物质是（）

A.vWF

B.组织纤溶酶原激活物

C.前列环素

D.硫酸乙酰肝素

E.血栓调节蛋白

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对于公民未经许可擅自从事依法应当取得行政许可的活动的，应当如何处理？（）

A、行政机关应当采取措施予以制止

B、行政机关应当依法给予行政处罚

C、行政机关认为其构成犯罪的，应移交司法处理

D、行政机关应当为其补办许可证件

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钩头装置中的钩头坠地的原因是什么？

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