女，24岁。发作性干咳3个月，无发热、咯血、胸痛、胸闷，多次拍胸片未发现异常，反复用过“阿莫西林、阿奇霉素及止咳药”未见效。去年3月曾有同样症状发作，服用过“氨茶碱”后完全缓解。查体：T37.2℃，P100次/分，R18次/分，BP120/75mmHg，双肺未闻及哮鸣音及湿啰音。
为明确诊断首选的检查是（）
A recent development is the local area network (LAN). (21) its name implies, it (22) a local area—possibly as small as a single room, typically an area like an university campus or the premises of a particular business. Local area networks were developed to (23) a need specific to microcomputers—the sharing of expensive resources. Microcomputers are cheap, (24) highcapacity disc stores, fast and/or good quality printers, etc. are expensive. The object of the LAN is to allow (25) microcomputers shared access to these expensive resources. Since the microcomputers are (26) , it is a necessary feature of a LAN that the method of connection to the network, and the network hardware (27) , must also be cheap.
A local area network links a number of computers and a number of sewers (28) provide communal facilities, e. g. file storage. (A server usually includes a small microprocessor for control purposes.) The c
A. and
B. but
C. yet
D. so
| Thousands of years ago man used handy
rocks for his surgical operations. Later he used sharp bone or horn, metal
knives and more recently, rubber and plastic and that was where we stuck, in
surgical instrument terms, for many years. In the 1960s a new tool was
developed, one which was, first of all, to be of great practical use to the
armed forces and industry, but which was also, in time, to revolutionize the art
and science of surgery. The tool is the laser and it is being used by more and more surgeons all over the world, for a very large number of different complaints. The word "laser" means: light amplification by stimulated emission of radiation. As we all know, light is hot, any source of light -- from the sun itself down to a humble match burning -- will give warmth. But light is usually spread out over a wide area. T A. leave their patients with negative effects B. can treat duly human eye diseases C. do little damage to their patients D. make their patients need a long time to recover [判断题]铁路篷布采用9位编号。
A.正确 B.错误 [多选题]消防员呼救器后场接收装置可以接收呼救器发射出的各种工作状态的无线电信号,包括()
A.正常工作状态信号 B.预报警工作状态信号 C.报警工作状态信号 D.超温报警工作状态信号 [判断题] 在处理火灾情况下建筑物倒塌,搬移建筑构件接近被救人员时,使用破拆工具或移动物品要仔细谨慎,尽量减少对被埋压人员的险情程度,必要时可用手或简易工具翻扒倒塌物件,直至将埋压人员救出。( )
A.正确 B.错误 [单选题]TDCS设备对于标定电压为AC24V的采集对象，采集电压应为（ ）。
A.AC24V±4.8V B.AC12V±2.4V C.AC36V±2.4V D.AC20V±2.4V [单项选择]实验设计的4个基本原则是（）
A. 对照原则、随机原则、重复原则、均衡原则 B. 抽样原则、随机原则、重复原则、均衡原则 C. 对照原则、随机原则、抽样原则、均衡原则 D. 分组原则、随机原则、重复原则、均衡原则 E. 对照原则、随机原则、分组原则、均衡原则 我来回答: 提交
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