-
题目：
未知类型
同一个控件可以使用多个验证控件。()
A.错误
B.正确
答案：
<查看本题扣1积分>
-
肾上腺皮质功能低下会出现（）。
-
Today ,as in every other day of the year ,more than 3000 U.S. adlescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime,it can be expected that of these 3000 about 23 will be murdered,30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweithts all other factors, whether voluntary or involuntary, as a cause of death. Since the late 1970s, when daily smoking among high school seniors reached 30 precent , smoking rates among youth have declined . While the decline is impressive ,several important issues must be raised. First, in the past several years,smoking rates among youth have declined very little. Second,in the late 1970s ,smoking among male high school seniors exceeded that among female by nearly 10 percent . The statistic is reversing.Third ,several recent studies have indicate high school dropouts have excessively high smoking rates, as much as 75 percent . Finally, thouth significant declines in adolescent smoking have occurred in the past decade,no definite reasons for the decline exist. Within this context,the Naional Cancer Instiute (NCI) began its current effort to determine the most effecive measures to reduce smoking levesl among youth. By "dropout" the author means（）.
-
肺炎链球菌肺炎实变期的体征，错误的是（）
-
雾霾天气不从事户外运动，停止长跑锻炼等，尤其是患有心血管疾病的人和年老体弱者。（）
-
在因特网上提供的服务有很多，以下不是提供的服务的是（）。
-
顽固性高血压，上腹部可闻及血管性杂音（）
-
某区域植物样本调查中，某一植物个体数量占样地面积的比例，可以说明该植物的（）。
-
关于破冰活动，下列说法正确的是。（）
-
昏迷、休克伤病员保持平卧，下肢略抬高，保持呼吸道畅通，头部应（），以防呕吐物、分泌物误吸入呼吸道。
-
大型汽轮机低压外下缸体前段和后端组合找中心时，作为基准的有（）。