阅读下列新闻报道材料，并根据材料后的问题作出解释说明：
德国将提前举行大选(2005年7月21日)
2005年7月21日，德国总统霍斯特.克勒发表电视讲话，宣布解散联邦议院，提前举行大选。此事的起因是5月22日北莱茵一威斯特伐利亚州的议会选举。在这次选举中，德国总理施罗德所在的社会民主党自1966年以来首次被对手基督教民主联盟击败。北威州举足轻重，是德国16个联邦州中人口最多的一个，占全国总人口数的五分之一以上。它是全德仅存的由社会民主党和绿党联合组成的左翼的“红绿联盟”执政的州。由于反对党基督教民主联盟已经控制了德国16个州中的10个，反对党不仅已在州一级政府占了绝对优势，而且在参议院中占了绝对优势。德国是一个联邦制国家，联邦参议院由各州政府派出的代表组成。这样，由于反对党右翼联盟占据了参议院的压倒多数，施罗德领导的红绿联盟联合政府就很难有作为了。
当晚，施罗德总理以由于社民党和绿党组成的红绿执政联盟在联邦议院中仅拥有微弱多数，他无法确保今后自己计划推行的各项政策能够获得所需要的稳定支持为理由，要求解散议会，提前举行大选。本届德国政府由施罗德领导的社会民主党和绿党联合组成，该联盟在议会601个席位中占有303席。
根据德国基本法规定，联邦总理可以向联邦议院提出信任案，如果他的信任案被拒绝，联邦总统可以应总理的建议解散联邦议院。7月1日，施罗德总理在联邦议院提出“信任案”。随后，联邦议院以151票赞成、296票反对、148票弃权的表决结果否决了施罗德提出的“信任案”，从而把解散议会、提前举行议会选举的决定权交与总统霍斯特-克勒。施罗德所在的社会民主党和绿党联盟多名议员投了弃权票。
克勒总统在电视演说中说，在做出决定前，他对施罗德提请解散联邦议院的理由进行了细致的评估，并深入了解了各方的意见。他最终得出的结论是：在目前情况下，提前举行大选对德国民众来说也许是最有利的选择。但是，少数联邦议院议员和部分小党已经决定将在克勒宣布解散议会后向联邦宪法法院提起诉讼，但是，联邦宪法法院推翻总统克勒解散议会决定的可能性很小。
问题：
这个事件说明，德国总统、总理和议会各自拥有什么权力？

A. The shellfish have a long history in the rock and many different kinds are known
B. Nevertheless, we know a great deal about many of them because their bones and shells have been preserved in the rocks as fossils. From them we can tell their size and shape, how they walked, the kind of food they ate.
C. The first animals with true backbones were the fishes, first known in the rocks of 375 million years ago. About 300 million years ago the amphibians, the animals able to live both on land and in water, appeared. They were giant, sometimes 8 feet long, and many of them lived in the swampy pools in which our coal seam, or layer, or formed. The amphibians gave rise to the reptiles and for nearly 150 million years these were the principal forms of life on land, in the sea, and in the air.
D. The best index fossils tend to be marine creature. There animals evolved rapidly and spread over large over large areas of the world.
E. The earliest animals whose remains have been found were all very simple kinds and lived in the sea. Later forma are more complex, and among these are the sea-lilies, relations of the star-fishes, which had long arms and were attached by a long stalk to the sea bed, or to rocks.
F. When an animal dies, the body, its bones, or shell, may often be carried away by streams into lakes or the sea and there get covered up by mud. If the animal lived in the sea its body would probably sink and be covered with mud. More and more mud would fall upon it until the bones or shell become embedded and preserved.
G. Many factors can influence how fossils are preserved in rocks. Remains of an organism may be replaced by minerals, dissolved by an acidic solution to leave only their impression, or simply reduced to a more stable form.