题目:
心室肌有效不应期的长短主要取决于
A.动作电位0期除极速度
B.阈电位水平高低
C.动作电位2期时程
D.钠泵功能
E.动作电位传导速度
答案:
参考答案:C
心室肌有效不应期的长短主要取决于
A.动作电位0期除极速度
B.阈电位水平高低
C.动作电位2期时程
D.钠泵功能
E.动作电位传导速度
参考答案:C
Never go into a supermarket hungry! This is a good piece of advice. If you go shopping for food before lunchtime, you’ll probably buy more than you plan to. Unfortunately, however, just this advice isn’t enough for shoppers these days. Modern shoppers need an education in how and how not to buy things at the store. First, you check the weekly newspaper ads. Find out the items that are on sale and decide if you really need these things. In other words, don’t buy anything just because it’s cheaper than usual! Second, never let “New and Improved!” or “All Natural” on the front of a package influence you. Instead, read the list of contents on the back. Third,compare prices: that is, you should examine the prices of both different brands(品牌)and different sizes of the same brand.
Another suggestion for shoppers is to buy ordinary items instead of famous brands. Ordinary items in supermarkets come in plain packages. These products are cheaper because producers don’t spend much money on packing or advertising. However, they are still of high quality. In the same way, in buying clothes, you can often find high quality and low prices in brands that are not famous. Shopping in discount clothing stores can help you save a lot of money. Although these stores aren’t very attractive, and they usually do not have individual dressing rooms, not only are the prices low, but you can often find the same famous brands that you find in high-priced department stores.
Wise shoppers read magazine ads and watch TV commercials(商业广告),but they do this with one advantage: knowledge of the psychology behind the ads. In other words, will-informed shoppers watch for information and check for misinformation. They ask themselves questions: Is the advertiser hiding something in small print at the bottom of the page? Is there any real information in the commercial, or is the advertiser simply showing an attractive image? With the answers to these questions, shoppers can make a wise choice.
小题1: The author gives ________ suggestions to the shoppers in the passage.
A.Three
B.Four
C.Five
D.Six小题2:We can learn from the passage that ____________________.
A.ordinary items are not so attractive because of the lower prices .
B.we can’t buy items with words like “New and Improved” or “All Natural”.
C.the advertisers are always showing misinformation in the commercial.
D.the quality of ordinary items can be as good as that of famous brands.小题3:The author’s main purpose of writing the passage is to advise shoppers _________________.
A.to buy ordinary items instead of famous brands
B.how to buy ordinary things in supermarkets
C.how to make a proper decision while shopping
D.not to believe advertisements or commercials
患者,女,20岁,急性扁桃体炎。表现为T38.9℃、咽痛、扁桃体肿大、充血、表面有脓点以及颌下淋巴结肿大。需青霉素治疗。
皮试后5分钟患者出现胸闷、气急、皮肤瘙痒、面色苍白、脉搏细弱、血压下降、烦躁不安,考虑患者可能发生()。
A.青霉素毒性反应
B.血清病型反应
C.呼吸道过敏反应
D.过敏性休克
E.皮肤组织过敏反应
伤塞病常有的合并症有( )。
A.肠梗阻
B.肠扭转、绞肠纱
C.肠癌
D.肠出血、肠穿孔
E.肾小球肾炎
作业人员在站内其他线路作业,列车进路不明时()下道避车。
A、可以
B、必须
C、最好
D、应
用电点的电压一般不宜低于设备额定电压的()%。
A.80;
B.85;
C.90;
D.95。