试题与答案

危险化学品生产企业、进口企业发现其生产、进口的危险化学品有新的危险特性的,应当及时向

题型:单项选择题

题目:

危险化学品生产企业、进口企业发现其生产、进口的危险化学品有新的危险特性的,应当及时向危险化学品登记机构办理()。

A、登记内容变更手续

B、新品登记手续

C、产品重新登记手续

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/1221/18cd9e67caf9a717dd6d80eecde3a7a6.html

下面是错误答案,用来干扰机器的。

参考答案:产于印尼苏门答腊,苦、浓香,在蓝山尚未出现之前,它曾被视为咖啡的极品。

试题推荐
题型:阅读理解

阅读理解。

     This is a talk by a London taxi(出租车)driver.

     "I've been a taxi driver for nearly ten years. Most London taxi drivers

have their own taxis."

     "It's a nice job most of time. you meet a lot of people. I always work

at night, because there is too much traffic during the day. I live twenty

miles(英里)outside London and I go to work at 5:30 in the afternoon."

     "I usually go home between 2 and 3 in the morning."

     "Some very strange things happened late at night .The other day I was

taking a woman home from a party .She had her little dog with her. When

we got to her house, she found that she had lost her key. So I waited in the

car with the dog while she climbed in through the windows."

     "I waited and waited. After half an hour of ringing the bell I decided to

find out what was going on .I tied the dog to a tree and started to climb in

through the window. The next thing I knew was that the police came.

They thought I was a thief(小偷).

     Luckily the woman came downstairs(下楼).She must have gone to

sleep and forgotten about me and the dog!"

1. The driver always worked at night because it was easier to _____.

A. drive

B. make money 

C. climb in through the window

D. meet a lot of people

2. The woman climbed in through the window because _____.

A. she wanted to have a sleep

B. her husband didn't open the door for her

C. she didn't want to pay the driver

D. she couldn't find her key

3. The story happened _____.

A. early in the morning

B. late at night

C. 20 miles outside London

D. near the police station

4. Which of the following is wrong?

A. The driver worked until between 2 and 3 in the morning.

B. The police made a mistake.

C. The woman had no money to pay the driver.

D. The woman had forgotten about the driver and the dog.

5. The driver climbed in through the window to

A. get money from the woman

B. return the dog to the woman

C. see what was happening in the house

D. phone the police

查看答案
题型:实验题

常用实验室制取氧气的方法有:

a.加热氯酸钾和二氧化锰粉末;

b.加热高锰酸钾固体;

c.用二氧化锰粉末作催化剂使过氧化氢(H2O2)溶液分解产生氧气.

(1)写出左图中指定仪器的名称:① _________ ;   ② _________ ;   ③ _________

(2)请仔细分析上图中装置A的特点,推测该装置可用于上述制氧气方法的有 _________ (填a、b或c);

(3)采用方法c制取氧气应该选用的气体发生装置是上图中的 _________ (填“A”或“B”);

(4)利用装置A制氧气,在结束实验时要先撤离导管出水面,再熄灭酒精灯,其目的是 _________ ;利用装置B制氧气时,长颈漏斗的下端要插入液面以下,其目的是 _________

查看答案
微信公众账号搜索答案