圆柱的底面积越大,它的体积就越大.______.

题型:解答题

问题:

圆柱的底面积越大,它的体积就越大.______.

考点:圆柱的表面积圆柱的体积
题型:解答题

史家认为,18世纪末至19世纪中期,对欧洲大陆来说是一个大动荡的时代,同时也是历史性变革的时代。导致这一历史性变革的原因是                          ( )

A.资本主义制度进一步确立

B.工业革命迅速扩展

C.各国工人运动的蓬勃发展

D.争夺世界霸权加剧

题型:解答题

Most sharks are dangerous. The largest kind of sharks—the whale shark—has small teeth and is quite harmless to people. However, blue sharks, tiger sharks, white sharks and hammerheads are enemies of man.

Man-eaters are always a danger to swimmers in shark waters. Sometimes, though, men have used strange methods when they’re suddenly faced with a shark.

During world War Ⅱ, soldiers and sailors whose boats or planes were destroyed drifted(漂流) helplessly on the ocean in small rafts(筏子). While waiting to be saved, the men had to struggle to stay alive and were often attacked by sharks. In some cases, they had few weapons to protect themselves with. They found that just splashing(溅水) water seemed to help keep the sharks away.

One sailor was swimming for his life in the Atlantic Ocean after his boat had been blown up. He saw a shark swimming towards him. He hit the shark with his bare fist, and that drove it off.

Once, in Australia, a fisherman was fishing after sunset. He hooked a big fish and drew it towards the shore. His line broke when the fish was only a few yards from the shore. The fisherman waded(涉水) into the water to try to catch it with his hands. In the dim light, it looked like the kind of fish that could be dealt with without danger.

He put his arms around the fish and wrestled with it. Dragging it to the beach turned out to be harder than he had expected, but at last he pulled it in. When he turned a light on it, he was amazed. He had caught a shark. It was small for a shark, but it was the man-eating type and was about as long as a tall man.In a word, the best way to deal with sharks is to keep far away from them.

60. The shark that is least dangerous to man is the ________.

A. white shark      B. whale shark   C. tiger shark     D. hammerhead shark

61. This story tells you that sharks are usually ________.

A. friendly         B. small         C. afraid of people     D. dangerous

62. After the Australian fisherman found he had caught a shark, he was _________.

A. surprised      B. frightened      C. unhappy      D. angry

63. This story tells you that the best way to handle sharks is to ________.

A. hit them with your fist                 B. keep far away from them

C. splash water                         D. wrestle with them

64. The passage mainly tells us something  ________.

A. about fishing sharks                  B. about sharks

C. how to eat  sharks                   D. that sharks are man’s enemies

题型:解答题

对于已损坏的道具,若留在境内未向海关申报的,海关可如何处理:

A.处货物价值5%以上30%以下的罚款

B.处货物价值10%以上30%以下的罚款

C.处货物价值15%以上50%以下的罚款

D.处货物价值20%以上30%以下的罚款

题型:解答题

关于神经系统基本概念的叙述,正确的是( )

A.形态和功能相似的神经元胞体聚集成团,都称为神经核
B.功能相同的神经纤维在周围部可聚合为粗细不等的神经
C.内脏神经即交感和副交感神经
D.每个神经元均具有多个树突和一个轴突
E.以上都不正确

题型:解答题

叙述膜片钳技术及操作模式。

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