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阅读理解。 Even if you are an experienced backpacker or climber, you need to know what to do if something goes wrong. It is not that Alaska is that much more dangerous than other places. It is no more hazardous than elsewhere, as long as the proper precautions (预防措施) are taken. So, being prepared is important to a safe trip. First of all, make sure you pack everything you will need for your trip. Even if you are traveling by car, pack clothers and gear (用具) for backpacking. Because of the extreme weather, cars break down frequently. Pack a coat, gloves, a hat, snow-pants, sleeping bags, candles, a flashlight, and high-energy food. If you are traveling by car, also pack extra belts, a spade, and a chain (铁链). If you are camping or hiking, make sure you know how to avoid bears. If you are lost in the forest, there is no doubt that you will encounter (遇到) them. However, there is no need to be nervous. Just take these precautions: make noise as you walk, bears will avoid you; cook your food away from where you sleep, and store your food away from where you sleep, so the bears are not attracted. Both of these should keep the bears away. However, if you do encounter a bear, there are two different schools of thought. One is to make noise and scare the bear away. The other is to stand still and speak softly to get the bear to leave. If you are dealing with a brown bear, you can climb a tree, since they cannot follow. But black bears can climb. If for some reason the bear attacks, play dead. Try to protect your head and neck, and hopefully the bear will leave its “dead” prey (捕获物). 1. The underlined word “ hazardous ”(in Paragraph 1) most probably means “______ ”. A. interesting B. dangerous C. wonderful D. important 2. The author mainly tells us in Paragraph 2 that ______ . A. it is dangerous to travel by car B. the weather is always bad in Alaska C. you should take what you need for your trip D. cars break down often while traveling 3. All the following can protect you from being attacked by bears EXCEPT that ______ . A. trying to make noise as you walk B. saying something to the bear in a soft voice C. using a club to scare the bear away D. pretending to be dead when you are in danger 4. The passage is mainly about ______. A. the tips on a safe trip in Alaska B. the very dangerous bears in Alaska C. how to prevent your cars from being attacked by a bear D. how to protect yourself when in trouble
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B.
不消耗能量而需载体
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不受饱和限速与竞争性抑制的影响
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受药物分子量大小、脂溶性、极性影响
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【单选题】下列关于药物被动转运的叙述哪一条是错误的
A.
药物从浓度高侧向浓度低侧扩散
B.
不消耗能量而需载体
C.
不受饱和度限速与竞争性抑制的影响
D.
受药物分子量大小、脂溶性、极性影响
【单选题】下列关于药物被动转运的叙述哪一条是错误的
A.
药物从浓度高侧向浓度低侧扩散
B.
不消耗能量而需载体
C.
不受饱和度限速与竞争性抑制的影响
D.
受药物分子量大小,脂溶性,极性的影响
E.
当细胞膜两侧药物的浓度平衡时转运停止
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不消耗能量而都需载体
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当细胞膜两侧药物浓度平衡时转运停止
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可不受饱和度限速与竞争性抑制的影响
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所有心肌细胞的功能都相同
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【单选题】下列关于药物被动转运的叙述哪一条是错误的:
A.
药物从浓度高侧向低侧扩散
B.
不消耗能量
C.
受饱和限速与竞争性抑制的影响
D.
受药物分子量大小、脂溶性、极性影响
【单选题】下列关于药物被动转运的叙述哪一条是错误的
A.
药物从浓度高侧向浓度低侧扩散
B.
不消耗能量而需载体
C.
不受饱和度限速和竞争性抑制的影响
D.
受药物分子量大小,脂溶性,极性影响
E.
当细胞膜两侧药物浓度平衡时转运停止
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