穿过漏电保护器的N线仍可作PEN线用。

某班同学参加学校运土劳动，一部分同学抬土，另一部分同学挑土，已知全班共用箩筐59个，扁担36根（无闲置不用工具），则共有______名同学抬土，______名同学挑土．

The house was quiet at 5 a.m. and Tim’s mother was asleep. Only the sound of the big freezer broke the quiet. He’d dreamt of the cave last night. The purring (轻微颤动声) of the freezer had been the sea.

Tim pulled on a sweater and put some apples into his schoolbag. It was too early for breakfast. He’d eat after he’d been through the cave, sitting on the rocks and staring at the sea.

He wished he had a proper pack. His schoolbag would have to do. What else? Sandwiches ---but his mother might wake up if he started pulling out bread for sandwiches, she’d want to know why he had to leave so early. He settled for some biscuits, and left a note stuck to the table.

Gone to Michael’s Back tonight .Tim.

The sky was high and soft and light outside, though the sun still wasn’t up. Even the highway up the hill was quiet as he made his way down the street. The wind from the sea was fresh and sweet.

The sandhills still breathed heat from yesterday’s sun, though the top of the sand was cool. He ran down to the beach impatiently, but there was no one, just dry sand dancing in the early wind and seabirds marching up and down watching the waves.

The light changed suddenly. The first rays of sunlight stretched across the sea. The sun was pushing its way over the edge of the world．

Over the first rocks, along to the point, Tim glanced back. The beach was still empty. The sun sailed higher in the sky.

He could see the cave now, even darker in the morning light. The sand turned silver then dark gold as the water flowed away from it. He had to force himself to go closer. Why was it so much more mysterious now? But it would be silly to go back now after so much trouble. He needn’t go in all the way …

小题1:What did Tim do at the beginning of the story?

A．He left the house quietly

B．He had breakfast at home.

C．He left a note on the freezer.

D．He put a sweater in his schoolbag.小题2:"He settled for some biscuits” ( in Paragraph 3 ) means that Tim_______.

A．left home looking for some biscuits

B．felt like eating biscuits rather than sandwiches

C．had to take biscuits instead of sandwiches

D．could only find some biscuits in the kitchen小题3:What made it possible for Tim to see the entry to the cave?

A．The height of the first rocks

B．The ups and downs of the waves

C．The change in the position of the sun

D．The vast stretch of the sunlit beach小题4:Which of the following statements is TRUE according to the story?

A．The sea looked like a piece of gold.

B．Seabirds flew away when Tim arrived.

C．Tim was the only person on the beach.

D．The sky got dark as Tim reached the cave.小题5:In the story, Tim’s mood changed from        .

A．loneliness to craziness

B．anxiousness to excitement

C．helplessness to happiness

D．eagerness to nervousness

风险是对预期的不确定性，是不可以被度量的。（）

《素问·五脏别论》中"魄门亦为五脏使"的"魄门"指（）

A.汗孔

B.玄府

C.气门

D.肛门

E.以上都不是