血液常规生化检查应选（） A.干燥试管 B.抗凝试管 C.血培养瓶 D.

已知r=4分米，h=3分米，求V_圆柱。

患者男，42岁。10小时前饱餐后出现持续性上腹痛，2小时前开始出现咳嗽，进行性呼吸困难。查体：BP85／50mmHg，P122次／分，T38.8℃，巩膜黄染，全腹压痛，伴反跳痛及肌紧张。血淀粉酶700U／L。

下列哪种诊断的可能性最大？（）

A.轻症急性胰腺炎

B.消化性溃疡穿孔

C.心肌梗死

D.重症急性胰腺炎

E.机械性肠梗阻

F.慢性胆囊炎

图为测量滑轮组机械效率的实验装置，钩码总重6N。

（1）实验时要竖直向上匀速拉动弹簧测力计，此时由图可知拉力大小为_____N。若钩码上升的高度为8cm，则弹簧测力计向上移动_______cm，该滑轮组的机械效率为________。

（2）若仅增加钩码的个数，该滑轮组的机械效率将________(选填“提高”、“降低”或 “不变”)

     Remember that people on line may not be who they seem, because you can't see or even hear the

person. It would be easy for someone to misrepresent himself/herself. Thus someone who says that "she

is a 12-year-old girl." could really be an old man.

1. The underlined word misrepresent means _____.

A. making a wrong judgment about  

B. understanding somebody wrongly

C. giving a wrong description of    

D. forming a wrong opinion about

     Climbing attracts people because it's good exercise for almost everyone. You use your whole body,

especially your arms and legs. This sport gives your body a complete workout. When you climb, both

your mind and your body can become stronger.

2. The word workout underlined in the last paragraph most probably means________.

A. settlement    

B. exercise    

C .excitement

D. tiredness

     According to a report published on the British medical magazine, The Lancet, a study of 10 German

mobile phone users found that when they turned on their phones, their blood pressure goes up by 5-10

millimeters of mercury (水银柱).

3. The word "The Lancet" is probably ______.

A. the name of a magazine    

B. the name of the research team

C. the name of a hospital      

D. the title of a medical report

鱼类的味觉机理