少阴热化证的心烦不寐是因（　）。A．热扰胸膈 B．热扰脑府 C．内有燥屎 D．肝阳上

Reading comprehension.

     There was a little dog in the street. He liked watching the children play. One day, he followed two children

home from school. Suddenly, he saw the children's house was on fire. He knew he needed to help them right

away. So he ran down the street to the fire station, barking all the way.

     When he arrived at the fire station,he saw the firemen leaving. He tried to run after them, but he could not

keep up. By the time he got back to the house, the street was filled with people. He looked for the children but

could not see them. He was very worried.

     The firemen worked very hard till the fire was out. A fireman named Jack noticed the little dog under a tree,

looking across the street at the burned house.

     Jack thought, "The dog could cheer up the kids." So he brought the little dog over to the children. The little

dog could not believe his eyes! The children were safe! He rushed to them. The children held the little dog and

felt a little better.

Fill in the blanks according to the passage.

     Only one word for each blank. A little dog and two children are good (1) _______. One day, he found the

children's house (2) _______ after the two children arrived home. At once he ran down to the fire station,

barking (3) _______ the street. When he (4) _______ back, he didn't find the children. He was so worried.

Just then a fireman, Jack, helped the (5) _______ dog find the children.

腐霉利

千斤顶的选择正确的是（）。

A、千斤顶的顶升高度不用超过螺杆或活塞总高的3/4

B、使用几台千斤顶顶升重物时，宜选择不超过两种型号的千斤顶

C、顶升重物时，应随重物下垫保险钢管

D、千斤顶放置位置与被顶物之间应保持夹角不大于30℃

Loran-C uses the multiple pulse system because（）.

A.Less signal energy is necessary for receiver operation

B.More signal energy is available at the receiver

C.It significantly increases the peak power

D.It increases the signal capacity

进行熔断器更换时，应换型号和容量相同的熔断器。