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问题 选择题
已知集合M={直线的倾斜角}，集合N={两条异面直线所成的角}，集合P={直线与平面所成的角}，则下面结论中正确的个数为（　　）
①M∩N∩P=(0，
π
2
]
②M∪N∪P=[0，π]
③(M∩N)∪P=[0，
π
2
]
④(M∪N)∩P=(0，
π
2
)．
A．4个B．3个C．2个D．1个
答案

∵根据定义，M=[0，π），N=（0，

π
2
]，P=[0，
π
2
]

∴M∩N∩P=（0，

π
2
]，①正确；

M∪N∪P=[0，π），②不正确；

（M∩N）∪P=[0，

π
2
]，∴③正确；

（M∪N）∩P=[0，

π
2
]，∴④不正确．

故选C

完形填空

第二节: 语法填空(共10空,每空1.5分,满分15分)

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，在空格处填人一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为26-35的相应位置上。

Many strange things were happening in the countryside of northeast Hebei, where the  water in the wells rose and fell,  26  smelly gas came from the cracks, the chickens and the pigs were too nervous to eat and even mice ran out of the fields    27   (look) for places to hide. Fish jumped out of   28   bowls and ponds. But the one million people in the city,  29 thought of little of these events, were sound asleep as usual that night. At 3:42 am, everything began to shake. The world seemed to be   30  an end. In fifteen terrible seconds a large city lay in ruins. Two-thirds of the people died or   31  (injure). All of the city’s hospitals,75% of  32   factories and buildings disappeared. All the railway tracks were now   33   (use) pieces of steel. It was very hard to get water, food and electricity. However, all hope was not lost. Soon after the earthquakes, many soldiers came to help the rescue workers. The army organized teams to dig out those who were trapped and     34   (bury) the dead. Workers built shelters for survivors    35  homes had been destroyed. Little by little, the city began to breathe again.

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多项选择题

并殖吸虫病神经系统症状复杂多变，主要包括（）

A.颅高压表现

B.严重者可有瘫痪、失语

C.早期有头痛、呕吐、反应迟钝等

D.后期常留癫痫反复发作

E.脊髓型可有感觉缺失，大小便失禁
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