题目内容
（请给出正确答案）
A.segmentation genes
B.gap genes
C.homeotic genes
D.pair-rule genes
E.segment-polarity genes
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A、Liu Baoquan
B、Bai Yunpeng
C、Zhang Xiaoxuan
D、Luo Yusheng
A、Rencent increases in spending for domestic security have slowed the growth are of the U.S economy.
B、Government policy has no effect on our standard of living.
C、We should cut total government spending.
D、The goal of any country's economic policy should be to increase the well-being of its poorest, most vulnerable citizens.
| 阅读理解 |
| A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports. Grimsvom is one of the largest and most active volcanoes in Europe. What makes Grimsvom different is that it lies under a huge glacier(冰川) of ice up to 12 meters thick. The hot volcano heats up the ice above it, which then forms a layer(层)of water between the glacier and the volcano.This layer of water puts pressure on the volcano, keeping it stable. As the water flows out from under the glacier, the pressure lifts. The lava(岩浆) from the volcano then comes up to the surface. This is exactly what happened today. Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM,one of Europe's biggest airlines, airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane's engines, causing damage to the plane. The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp glasslike rocks all over the countryside. Farmers are keeping their animals inside to stop them from eating ashcovered grass or the sharp object. 1．What makes Grimsvom different from other volcanoes？ A．It is below ice. B．It lies under the sea. C．It is the largest volcano. D．Its lava affects the airlines. 2．What keeps Grimsvom still？ A．The slow flow of water. B．The low water temperature. C．The thick glacier. D．The water pressure. 3．Which of the following is the result of the volcanic eruption？ A．People stop traveling in Europe. B．Airlines suffer from the loss of planes. C．It becomes dangerous for animals to eat outside. D．Farmers have lost many of their animals. 4．This text is most probably taken from________. A．a research paper B．a newspaper report C．a class presentation D．a geography textbook |
A、TV, movies, and the Internet will become dominant fixtures in their lives.
B、They may suffer from depression, anxiety or a decrease in self-esteem.
C、Their lives will be improved by such a pleasant diversion.
D、They will no longer live their lives in a fantasy world.
A、A gene products
B、A + B gene products
C、B + C gene products
D、C gene products
E、A + C gene products
A、petals, sepals, carpels, and stamens
B、sepals, petals, stamens, and carpels
C、carpels, stamens, petals, and sepals
D、stamens, carpels, sepals, and petals
E、carpels, petals, sepals, and stamens
A、The same genes in distantly related organisms can shape similar developmental pathways.
B、The eyes of insects and mammals must have evolved independently during evolution.
C、A common pathway underlies eye development in all three organisms.
D、All three genes evolved from a common ancestral sequence.
A、cytotoxic chemicals.
B、hormones.
C、antibodies.
D、ROS.
E、complements.
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