红下一着走炮七进六绝杀，这种杀法称为？（） A.闷杀杀法 B.海底捞月杀法 C.炮碾

在DES加密算法中用不到的运算是______。

A．逻辑与

B．异或

C．置换

D．移位

支配舌体运动的是（）

A.舌神经

B.舌咽神经

C.舌下神经

D.鼓索神经

E.下颌神经

One sunny day last September, Tim heard some shouting. Looking out to the sea carefully, he saw a couple of kids in a rowboat were being pulled out to sea.

Two 12-year-old boys, Christian and Jack, rowed out a boat to search for a football. Once they'd rowed beyond the calm waters, a beach umbrella tied to the boat caught the wind and pulled the boat into open water. The pair panicked and tried to row back to shore. But they were no match for it and the boat was out of control.

Tim knew it would soon be swallowed by the waves. "Everything went quiet in my head," Tim recalls(回忆). "I was trying to figure out how to swim to the boys in a straight line."

Tim took off his clothes and jumped into the water. Every 500 yards or so, he raised his head to judge his progress. "At one point, I considered turning back," he says. "I wondered if I was putting my life at risk." After 30 minutes of struggling, he was close enough to yell to the boys, "Take down the umbrella!"

Christian made much effort to take down the umbrella. Then Tim was able to catch up and climb aboard the boat. He took over rowing, but the waves were almost too strong for him.

"Let's aim for the pier(码头)," Jack said. Tim turned the boat toward it. Soon afterward, waves crashed over the boat, and it began to sink. "Can you guys swim?" he cried. "A little bit," the boys said.

Once the were in the water, Tim decided it would he safer and faster for him to pull the boys toward the pier. Christian and Jack were wearing life jackets and floated on their backs. Tim swan toward land as water washed over the boys' faces.

“Are we almost there?" they asked again and again. "Yes," Tim told them each time.

After 30minutes, they reached the pier.

小题1:what does “it” in paragraph 2 refer to ?

A．The beach

B．the water

C．the wind

D．the boat小题2:why did Tim raise his head regularly?

A．to take in enough fresh air

B．To consider turning back to not.

C．To check his distance from the boys

D．To ask the boys to take down the umbrella小题3:How did the two boys finally reach the pier?

A．They swam to the pier all by themselves.

B．They were washed to the pier by the wave.

C．They were carried to the pier by Tim on his back.

D．They were dragged to the pier by Tim.

人文发展指数（HDI）的三项指标不包括

A．预期寿命

B．国内生产总值

C．教育程度

D．三类产业产值比重

患儿男性，12岁，小学五年级学生，主要因上课注意力不集中、学习困难来就诊。患儿自上幼儿园起即开始好动，常常坐不住，不能安静坐下来听故事或看图书。6岁上学后，老师经常反映患儿上课坐不住，小动作多，注意力不集中，常东张西望。写作业也常常边写边玩。需有他人催促才能完成，而且经常因为粗心大意而出错。患儿常常丢三落四，话多，爱插话或接话茬，情绪不稳定，常因一点小事而发脾气，学习成绩仅能达到及格水平。该患儿考虑是（）。

A.正常儿童

B.精神发育迟滞

C.儿童多动症

D.学习困难

E.躁狂症