低流量吸入麻醉的优点（） A.减少手术室污染，节约吸入麻醉量 B.新鲜气流量为4

小天鹅歌舞团有小演员45名。关于这45名小演员，甲乙丙三人有如下讨论：甲说："这些小演员中有些是北京人。"乙说："小演员中的李欣欣不是北京人。"丙说："这些小演员中有些不是北京人。"事实上，甲乙丙三人的话只有一句为真。

请问，下面哪个选项为真？（）

A.45名小演员都不是北京人

B.有些小演员不是北京人

C.李欣欣不是北京人

D.45名小演员都是北京人

有位教师在讲解《近代西方资本主义政体的建立》时把“近代以来主要资本主义国家的政治发展模式”梳理成以下四点，评委老师一致认为有一点归纳是不妥当的，另外三点总结得很好，你认为评委老师肯定的是

①英国模式：渐进改革      ②法国模式：人民革命

③德国模式：专制独裁      ④美国模式：至善至美

患儿，10岁，发热2天伴水样腹泻2次，2小时前突然感胸闷不适、腹痛、烦躁不安，晕厥一次。查体.T：38.5℃，面色苍白，气稍促，BP：60/40mmHg。心率160次/分，心律不齐，心音强弱不一，心界扩大。

有助于临床诊断的主要依据是（）。

A.血电解质测定

B.血清CK-MB

C.大便病毒分离

D.血液病毒分离

E.血培养

F.心肌肌钙蛋白阳性

木芙蓉

吕本中
小池南畔木芙蓉，雨后霜前着意红。
辛苦孤花破小寒，花心应似客心酸。

窗前木芙蓉

范成大
犹胜无言旧桃李，一生开落任东风。
更凭青女^①留连得，未作愁红怨绿看。
[注] ①青女：传说中掌管霜雪的女神。

这两首诗都描述了木芙蓉的什么自然属性都运用了哪种修辞手法

World Water Shortage

A new study warns that about thirty percent of the world’s people may not have enough water by the year 2025.
A private American organization called (1) Action International did the new study. It says (2) than three-hundred-thirty-five-million people (3) enough water now. The people live in twenty-eight (4) . Most of the countries are in Africa or the (5) East.
P-A-I researcher Robert Engelman says (6) the year 2025, about three-thousand-million people (7) lack water. At least 18 more countries are (8) to have severe water problems. The demand (9) water keeps increasing. Yet the amount of water on Earth (10) the same.
Mr. Engelman says the population in countries that lack water is (11) faster than in other parts of the world. He says (12) growth in these countries will continue to (13) .
The report says lack of water in the future may (14) in several problems. It may increase health (15) . Lack of water often means drinking (16) not safe. Mr. Engelman says there are problems (17) over the world because of diseases, such as cholera, (18) are carried in water. Lack of water may also result (19) more international conflict. Countries may have to (20) for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.