寨卡病毒源自非洲,通常经蚊子叮咬传播,会引起寨卡热,其症状包括发热、红疹、头痛、关节痛、肌肉痛以及非化脓性结膜炎等,但极少有严重病例发生。寨卡病毒正在美洲“爆炸式”传播,预计该病毒可能在美洲感染三四百万人。预防和控制寨卡病毒的有效手段是去除和改造蚊虫孳生地,减少蚊子与人接触的机会。
第31届夏季奥运会定于2016年8月在巴西里约热内卢举行,然而寨卡病毒流行引发担忧,但奥运会不会因寨卡病毒而取消。巴西总统府民事办公室主任雅克·瓦格纳建议,孕妇尽量避免前往巴西观看奥运会。
连线:
①动物的取食
____
a应激性
②向日葵朝向太阳
b生长
③人体的排汗
c营养
④蘑菇由小长大
d繁殖
⑤鸟类产卵
e排泄
阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空格处填入一个适当的 词或使用括号中词语的正确形式填空。
One day a man put ____ ad in most of the newspapers in England. He said that he was a young man with millions of ____ (pound) and great knowledge. He'd like to find a girl to be his wife and the girl must be like the one in the books ____ (write) by Somerset Maugham. Thousands of parents and young girls knew about the ad at once. Parents all went to the ____ (bookshop) to look for Somerset Maugham's books. They ____ (buy) those books for their daughters ____ presents. Girls tried to get those books to read although they weren't interested in ____ (read). They wanted to know what kind of person the rich man wished for. Before long all the books of Maugham were ____ (sell) out and the writer ____ (be) known all over ____ country. Who was the rich man? It was Somerset Maugham who put the ad in the newspapers! The ad saved his books and it made him famous too!
在制糖工业中,要用沸腾的方法去掉糖中的水份,但糖在100℃左右会变质,这时要保证锅内的气压____ 1个标准大气压,使锅内水的沸点____ 100℃(均选填“大于”、“小于”或“等于”)。