根据上图,请从以下选项中选出一条典型的生长曲线的四个生长时期。
A.对数期 延迟期 稳定期 衰亡期
B.对数期 延迟期 衰亡期 稳定期
C.延迟期 对数期 稳定期 衰亡期
D.稳定期 对数期 延迟期 衰亡期
A.对数期 延迟期 稳定期 衰亡期
B.对数期 延迟期 衰亡期 稳定期
C.延迟期 对数期 稳定期 衰亡期
D.稳定期 对数期 延迟期 衰亡期
请从下列选项中选出“在美国,人人都能买到枪”地道的英文表达。()
A、In the United States, everyone can buy a gun.
B、In the United States, guns are available to everyone.
C、In the United States, every person can buy a gun.
要求受测者必须从两个或两个以上的选项中,选出最能代表自己特征的描述语句。这种评定量表是()
A.观察式量表
B.锚定式量表
C.迫选式量表
D.数字式量表
下列选项中不属于捕食的一项是()
A.根瘤菌生存在豆科植物中
B.寄生蜂将卵产在昆虫卵内
C.寄生物从宿主获得营养
D.狼吃兔子
根据以下选项,回答 93~94 题:
A.尿钙排出增加
B.尿氮排出减少
C.糖原分解
D.尿氮排出增加
E.糖生成增加
第 93 题 饥饿后期的代谢变化()
应用文理解:请根据文章内容从每道题中的四个选项中选出最佳答案。
Vitamins are important to our health. Different vitamins are found in different foods -grains, vegetables and fruits, fish and meat, eggs and milk products. So which foods should be eaten to get enough of the vitamins our bodies need? Let us look at some important vitamins for the answer.
Vitamin A helps prevent skin and other tissues from becoming dry. People who do not get enough Vitamin A cannot see well in darkness. They may develop a condition that dries the eyes. This can result in infections and lead to blindness. Vitamin A is found in fish liver oil. It is also in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into Vitamin A.
Vitamin BI is also called thiamine (硫胶). Thiamine changes starchy foods into energy. It also helps the heart and nervous system work smoothly. Without it, we would be weak and would not grow. We also might develop beriberi (脚气病). Thiamine is found not just in whole grains like brown rice, but also in other foods. These include beans and peas, nuts, and meat and fish.
Vitamin C is needed for strong bones and teeth, and for healthy blood passages. It also helps wounds heal quickly. The body stores little Vitamin C. So we must get it every day in foods such as citrus fruits, tomatoes and uncooked cabbage.
Vitamin D increases levels of the element calcium (钙) in the blood. Calcium is needed for nerve and muscle cells to work normally. It is also needed to build strong bones. Vitamin D prevents the children's bone disease rickets (佝偻病). Ultraviolet light from the sun changes a substance in the skin into vitamin D Fish liver oil also contains vitamin D. In some countries, milk producers add vitamin D to milk so children will get enough.
Vitamin K is needed for healthy blood. It thickens the blood around a cut. to stop bleeding. Bacteria in the intestines (肠道) normally produce vitamin K. It can also be found in pork products, liver and in vegetables like cabbage, kale and spinach.
Lack of Vitamin A will lead to______.
A.night blindness
B.heart disease
C.beriberi
D.rickets
A.单击“开始”-“运行”,然后输入“ cmd”并执行后进入到“命令提示符状态”;
B. 双击“我的电脑”,启动计算机的操作界面;
C. 输入命令“ipconfig www.bnude.com” 并回车,系统会立即执行此命令;
D. 输入命令“ping www.bnude.com”并回车,系统会立即执行此命令。
E. 从其反馈信息中可以获得网站 www.bnude..com对应的IP地址。