甲数是x，比乙数大12，表示两数和的式子是[ ] A．x+12 B．x+（x-1

阅读理解。

     Betty is an American school girl. She is very happy because her parents will take her to China for a

visit. They are going to fly from New York on June 30 and get to Beijing on July 1. They will stay at

Lido Holiday Inn. Their Chinese friends will show them around Beijing. They are going to visit the

Palace Museum, the Summer Palace, the Temple of Heaven and the Great Wall. They will also visit

some Chinese homes and try some Chinese food. They will spend a week in Beijing and then go to

Xi'an, Guilin and some other places for sightseeing. The whole trip will take three weeks and she

is sure she will have a great time in China.

1. Betty is very happy because she will ______ with her parents. 　　[ ]

A. visit China 　　

B. go home 　　

C. watch TV 　　

2. Their ______ friends will show them around Beijing. 　　　[ ]

A. Australian 　　

B. Chinese 　　

C. American 　

3. From the text we can know that they will ______ in Beijing. 　　[ ]

A. cook Chinese food 　　

B. Learn to speak Chinese　 　　

C. try some Chinese food 　　

4. After they visit Beijing, they will go to ______. 　　[ ]

A. Xi'an and Guilin 　　

B. The Summer Palace　　　 　　

C. Shanghai 　　

5. How long will the whole trip take? 　　[ ]

A. one week 　　

B. two weeks 　　

C. three weeks

能量多普勒技术的临床应用特点，下列哪项是错误的（）。

A.易受低频噪音信号干扰

B.显示血流方向性提高

C.不受声束与血流夹角的影响

D.低速血流检测的敏感度增高数倍

E.无彩色血流信号混叠现象

急性肾小球肾炎尿呈浓茶色的原因是（）

A.尿液为酸性

B.尿相对密度增高

C.尿酸盐结晶

D.饮水少

E.尿蛋白太高

下列哪项不属于现代的输血观念（）

A.限制输血适应证

B.慎重使用血浆

C.提倡使用浓缩红细胞

D.提倡自体输血

E.常规补充钙剂

男，21岁，发作性意识丧失5年，每次发作均伴有全身不自主抽搐，尿失禁，口唇青紫，持续1~2分钟。意识逐渐恢复后，仍昏睡，头痛、无力，对抽搐全无记忆

诊断首先考虑（）

A.癔症

B.晕厥

C.TIA

D.发作性低血糖

E.癫痫