“指运港”栏：( )。A．新加坡 B．马来西亚 C．神户 D．日本

根据《建筑设计防火规范》的机械防烟规定，建筑防烟楼梯间内机械加压送风防烟系统的正压值应为40～50Pa；前室、合用前室应为（）Pa。

A.30～40

B.25～30

C.20～50

D.10～19

载波相位测量测定的是载波从卫星到接收机的（）。

D

Any mistake made in the printing of a stamp raises its value. A mistake on one inexpensive postage stamp has made the stamp worth a million and a half times its original (本来的) value. The mistake was made more than a hundred years ago in the British colony (殖民地)of Mauritius, a small island in the Indian Ocean. In 1847 an order for stamps was sent to a London printer—Mauritius was to become the fourth country in the world to issue (发行) stamps.
Before the order was delivered(传达), a party was planned at Mauritius’Government House, and stamps were needed to send out the invitations. A local printer was told to copy the design for the stamps. He printed the words " Post Office " instead of " Post Paid " by mistake on the several hundred stamps that he printed.
Today there are only twenty-six of these misprinted stamps left—fourteen Onepenny Orangereds and twelve Twopenny Blues. Because of the Twopenny Blue’s rareness (稀少) and age, collectors have paid as much as $ 16800 for it.

$ 16800 is the collector’s value of ______.

A．the Onepenny Orange—Red

B．a correctly printed 1847 stamp

C．the Twopenny Blue

D．both A and C

女性，59岁，慢性咳喘20年。近5年来动则气急，并常有尿少、下肢水肿。3天前"感冒"，自服"感冒通"后热退，但气急、咳嗽加重，昨夜因失眠服地西泮（安定）后入睡，今晨家人见其呼之不应，送来急诊。体检见神志恍惚，呼吸浅速，频率28次／分，发绀明显。两肺散在干湿啰音。呼吸空气条件下动脉血气分析示pH7．29，PaCO210．5kPa（80mmHg），PaO6．1kPa（46mmHg）

该患者是否需要气管插管机械通气，下列意见中比较合理的是（）

A.先试用中枢兴奋剂和呼吸兴奋剂，若神志不见改善或恶化时再插管

B.立即气管插管，辅助机械通气

C.不应插管

D.氧疗无效再考虑插管

E.插管与否，应取决于气道阻塞程度和PaCO高低

女性，45岁，间歇性发作咽下困难3个月，可因情绪波动诱发。食管造影未见异常。

患者在等候检查时突然出现胸骨后剧烈疼痛，并放射到左肩，持续1小时，为了解病因，此时应立即做( )

A．胃镜

B．ECG

C．食管内pH及压力测定

D．静滴硝酸甘油

E．肌内注射阿托品止痛