重Q=2吨的重物在吊索上以匀速v=5m/min下降，由于吊索嵌入滑轮卡子，突然停止

阅读下面的两段文言文，完成问题。

　　（甲）风烟俱净，天山共色。从流飘荡，任意东西。自富阳至桐庐，一百许里，奇山异水，天下独绝。水皆缥碧，千丈见底。游鱼细石，直视无碍。急湍甚箭，猛浪若奔。夹岸高山，皆生寒树。负势竞上，互相轩邈；争高直指，千百成峰。泉水激石，泠泠作响；好鸟相鸣，嘤嘤成韵。蝉则千转不穷，猿则百叫无绝。鸢飞戾天者，望峰息心；经纶世务者，窥谷忘反。横柯上蔽，在昼犹昏；疏条交映，有时见日。（吴均《与朱元思书》）

　　（乙）西湖最盛，为春为月。一日之盛，为朝烟，为夕岚。今岁春雪甚盛，梅花为寒所勒，与杏桃相次开发，尤为奇观。石篑数为余言：傅金吾园中梅，张功甫玉照堂故物也，急往观之。余时为桃花所恋，竟不忍去。湖上由断桥至苏堤一带，绿烟红雾，弥漫二十余里。歌吹为风，粉汗为雨，罗纨^①之盛，多于堤畔之草，艳冶极矣。然杭人游湖，止午未申^②三时；其实湖光染翠之工，山岚设色之妙，皆在朝日始出，夕舂^③未下，始极其浓媚。月景尤为清绝：花态柳情，山容水意，别是一种趣味。此乐留与山僧游客受用，安可为俗士道哉？（袁宏道《晚游六桥待月记》，有删节）

注：①罗纨（wán）：丝织品。②午未申：指午时、未时、申时三个时辰，相当于现在从上午十一时至下午五时的这一段时间。③夕舂：夕阳。

1．解释下列语句中划线词的意思。

①急湍甚箭，猛浪若奔　　奔：________________

②泉水激石，泠泠作响　　作：________________

③梅花为寒所勒　　　　　勒：________________

④山岚设色之妙　　　　　设：________________

2．翻译下面的句子。

①经纶世务者，窥谷忘反。

译文：_________________________________________________

②此乐留与山僧游客受用，安可为俗士道哉？

译文：_________________________________________________

3．甲、乙描写的对象各不相同，但是两位作者却都流露出相似的思想感情。请从对待风景和对待世俗社会两个角度写出作者的思想感情。

_________________________________________________

Every time you go to the supermarket you come away with your purchases packed in plastic bags. But wouldn’t it be kinder to the environment if you asked for paper bags instead?

The answer is not as easy as it might seem. Environmentalists say there are drawbacks to using both plastic bags and paper bags.

80 percent of groceries in the US are packed in plastic bags and the numbers are becoming huge. Consumers use between 500 billion and 1 trillion plastic bags per year worldwide.

Some experts believe that all these bags harm the environment. Plastic takes hundreds of years to break down and, as it does so, poisonous materials are released into the water and soil.

Further damage is caused if plastic bags enter the sea. For example, endangered sea turtles cannot tell the bags from jellyfish, their main source of food, and often choke on them.

However, this kind of bag does have its advantages.

Paper bags use more energy and create more waste than plastic bags. Plastic bags require 40 percent less energy to produce and cause 70 percent less air pollution. They also release as much as 94 percent less waste into the water than paper ones do.

But paper bags do break down more quickly than plastic bags. They don’t endanger wildlife, either.

So what should we do? One possible solution would be to use biodegradable plastic bags. “Biodegradable” means that the bags break down naturally just like a piece of banana peel when it is left outside.

But until biodegradable technology improves, it might be easier to pack things you buy in reusable cloth bags.

小题1:Compared to paper bags, plastic bags ______.

A．produce 6 percent more waste

B．can be made biodegradable more easily

C．can be used as a source of food

D．save 40 percent of the energy小题2:By saying “The answer is not as easy as it might seem,” (in paragraph 2) the writer means _____.

A. biodegradable plastic bags can compete with paper

B. paper bags seem to be kind to environment

C. it’s difficult to say whether plastic or paper bags are better for the environment

小题3:What does the author suggest people use at the present time?

A．Paper bags

B．Plastic bags

C．Biodegradable plastic bags.

D．Cloth bags.

一过性视力丧失可见于以下疾病

A．视网膜中央动脉痉挛

B．视 * * 水肿

C．白内障

D．体位性低血压

E．弱视

患者，女，19岁。经期前后不定，经量或多或少，经行不畅，有血块，胸胁、 * * 、少腹胀痛，精神抑郁，舌苔薄白，脉弦。治疗应首选

A．香棱丸
B．丹栀逍遥散
C．逍遥散
D．乌药汤
E．柴胡疏肝散

以下是免疫活性细胞的是

A．红细胞

B．神经细胞

C．血小板

D．吞噬细胞

E．精细胞