Malaysia Airlines (马航) flight MH370 disappeared from radar (雷达) screens an hour after it took off on March 8.It has 1 for more than 3 months.

    The plane may fall into the sea. China，Malaysia and many other countries have joined to search the 2 on the sea. The relatives of the 227 passengers and 12 crew (乘务人员) are 3 good news from them.

    How did the accident 4？It is said that the plane was attacked (攻击) by the terrorists. Some think there may be something wrong with the plane，and others think the accident may be 5 by the mistake of the crew. However it is 6 to tell the reason because the plane hasn't been found yet.

    It may 7 some time to find the missing plane and even more time to get to know the truth of what happened. However，we can't stop imagining what happened to the plane 8 it is found.

    Whether the missing plane is found 9 not，the whole world should pay more attention to the safety of people，especially at airports.

    We hope these people on the plane will be 10，and they can get together with their family members.

目前环境保护已成为人们极为关心的问题。 假设你受邀参加一次国际中学生环境保护论坛征稿活动，请按根据以下提示，用英语写一篇应征短文： 1.简述目前环境状况； 2.环境污染产生的原因及对生活的影响； 3.提出两个解决办法。

注意：1.词数 120 左右；2.可以适当增加细节，以使行文连贯； 3.文中不得透露个人姓名和学校名称。

    The environment has become a matter of great concern to the general public.……

一个电热器接在电压为10 V的电源上，电功率为10 W，那么（    ）