一般来讲，杂货船的热带载重线（）同级别木材船的热带木材载重线。A．稍高于 B．稍低于

董事会的职权不包括( )。

A．决定公司内部管理机构的设置

B．决定聘任或者解聘公司经理及其报酬事项，并根据经理的提名决定聘任或者解聘公司副经理、财务负责人及其报酬事项

C．主持公司的生产经营管理工作，组织实施董事会决议

D．组织投资建设项目竣工验收准备和建设项目竣工验收后移交生产运营的相关工作

E．组织实施公司年度经营计划和投资方案

高纯氧化铁(α-Fe₂O₃)是现代电子工业的重要材料。实验室用硫铁矿烧渣（主要成分是Fe₂O₃、FeO、SiO₂等）为原料制备高纯氧化铁的步骤如下：

请回答下列问题：

(1)实验室用18.4 mol/L的浓硫酸配制250 mL 4 8 mol/L的硫酸溶液，所用的玻璃仪器除胶头滴管、量筒、烧杯、玻璃棒和酸式滴定管外，还需_________（填写仪器名称）。

(2)溶液X中加入铁粉后可能发生反应的离子方程式为______________________

(3)某同学选用下列装置来制备纯净干燥的氨气，请完成下列有关问题：

①装置A中可以选用下列试剂中的___________（填写序号字母）；

a．(NH₄)₂SO₄和生石灰 b．NH₄Cl和Ca(OH)₂固体 c．NH₄HCO₃固体 d．NH₄Cl固体

②装置C中试剂最好选用_________（填写试剂名称）；

③收集NH₃时，气体应由_________（填写导管口代号）通入。

(4)写出氨水与NH₄HCO₃溶液反应的离子方程式__________________

阅读下面的短文，然后将划线部分句子译成汉语或英语。

To many students, joining social media (社交媒体) “circles” is now more important than making new friends in real life. And it’s easy. If you have a cell phone, you can download apps. Sina Weibo, WeChat and QQ are the most popular among them.

“I love to check my friends’ updates (更新).小题1: I also enjoy news and jokes shared on social media,” said Ou Wei, 14, from Hongling Middle School in Shenzhen. While enjoying these, Ou makes himself stay from real life. “I love playing the games on WeChat, but have no interest in playing flying chess with my classmates,” said Ou Wei.

小题2: Zhang Le（张乐）, 14, from No. 12 Middle School in Shanghai, said that social media has affected their normal life a lot. Recently his school held a basketball match, and a student hurt his leg.小题3:大多数学生忙着发送关于这个事故的照片而不是帮助他。“I think they need to learn to balance their real and online lives,” said Zhang.

小题4:What worries parents and teachers is safety.“Many students are happy to tell their interests and personal information to their social media ‘friends’. 小题5: 据报道这种信息可能会给他们带来危险,” said Han Songjun, a teacher at Hongling Middle School.For example, WeChat’s shake-shake function (功能) allows users to connect to other users close by. But police authorities warn about the risks of socializing in this way. “Be careful. Do not use the locating (定位) function in any app, do not give your name, and do not post the photos of your residential area (小区),” said Han.

发现饭后多人有呕吐、腹泻等不正常症状时，尽量让病人大量饮水，刺激喉部使其呕吐。

变压器是根据______工作的，它是由______和______构成的。