射孔完井的气井在投产初期油管内堵塞原因最可能是（）。A、压井液沉淀堵塞 B、泡排剂沉

避免在餐后（）内留取咽拭子标本，以防呕吐。

A.1h

B.2h

C.3h

D.4h

Have you ever seen a horse with toes(脚趾)？Millions of years ago, horses had many toes. They had four toes on each front foot. They had three toes on each back foot. The horses were no bigger than the cats.These small horses lived in the forest. The toes helped the horses run on the soft, wet ground.

At first, it was very hot in the forest. But the weather changed. It became very cold. Many trees could not live in cold weather. The trees died and fell. Open fields took the place of forests. The sun made the ground dry and hard.

Horsed began to change, too. They began to get bigger. This took a long time. On the dry, hard land, horses needed only their middle toes for running. Their middle toes became hard. After a long time, horses had only one hard toe on each foot. Now we call this hard toe a hoof.

小题1:How many toes did a horse have millions of years ago?

A．14

B．12

C．16

D．13小题2:What does the underlined word “hoof” mean in Chinese?

A．尾巴

B．马鬃

C．腿

D．蹄子小题3:What was the weather like in the forest at first?

A．Very warm

B．Very hot

C．Very cold

D．Very cool小题4:Which is WRONG according to the passage?

A．The horses were much bigger than the cats millions of years ago.

B．The trees died and feel because the weather changed.

C．On the dry, hard land, horses needed only their middle toes for running.

D．The horses have fewer toes than before.小题5:The main idea of the passage is that_______________.

A．horses had three toes on each back foot.

B．horses lived in the hot forest

C．horses changed a lot over the years

D．horses didn’t like the cold weather

用长春新碱做化疗时可能引起的特殊的不良反应是

A．血尿
B．恶心
C．食欲减退
D．神经症状
E．白细胞下降

《建设工程安全生产管理条例》第三十二条规定，施工单位应当向作业人员提供安全防护用具和安全防护服装，并（）告知危险岗位的操作规程和违章操作危害。

A.门头

B.书面

C.在三级教育中

D.由师傅

阅读下列材料：

材料一：

中国位于亚欧大陆的东端，内陆幅员辽阔、资源丰富，有大规模的江河流域和肥沃平原。天然的广阔内陆有利于政治上的整合，形成统一的中央集权的国家；肥沃的土地、丰富的内陆资源，为相对封闭的自给自足的农本经济提供了天然基础。——人民版《历史I教师教学用书》

材料二：

直接民主制度唯有在领土狭小的城市国家（城邦）中才有可能。在这些国家中，乡居的公民进城参加公民大会可以朝出暮归，人们相互间比较熟悉，一国政务比较简单，易于在公民大会中讨论和表决。在领土广阔的国家，这些条件是全不具备的。所以，城邦制度和直接民主两者是互相依赖，互为条件的。——顾准《希腊城邦制度——读希腊史笔记》

材料三：

黑格尔在提到希腊自然环境时说：“希腊全境满是千形万态的海湾。这地方普遍的特质便是划分为许多小的区域，同时各区域间的关系和联系又靠大海来沟通。我们在这个地方碰见的是山岭、狭窄的平原、小小的山谷和河流；这里没有大江巨川，没有开阔的‘平原流域’；这里山岭纵横，河流交错，几乎没有一个大面积的整块。”（《历史哲学》）这种自然环境导致多种经济形态并存，生产、生活方式多样，航海交通和商业贸易发展。——岳麓版《历史I》

据材料二、三，从政治前提、地理环境、经济形态三个方面归纳古希腊实行该政治制度的原因。