妊娠晚期需用解热镇痛药时，应选用（）。A.阿司匹林 B.对乙酰氨基酚 C.双氯灭痛 发布时间：2017-06-19 19:29 │ 来源：www.tikuol.com 题型：单项选择题 问题： 妊娠晚期需用解热镇痛药时，应选用（）。A.阿司匹林B.对乙酰氨基酚C.双氯灭痛D.布洛芬
题型：单项选择题 如图所示，某同学用弹簧测力计拉着放在水平桌面上的木块匀速滑动，在木块前端离开桌面至一半移出桌面的过程中，弹簧测力计的示数＿＿＿＿，木块对桌面的压强＿＿＿＿。（均选填“变大“、“变小”或“不变”） 查看答案
题型：单项选择题 阅读理解。根据短文内容，从下框的A---F选项中选出能概括每一段主题的最佳选项。 选项中有一项为多余选项。 A. The absorbing nourishment (营养) of cellsB. Each organ of body can work individually C. The excreting (排泄) and cleaning of cells D. The regeneration of cells E. The cell living in a community of cellsF. The cause of illnesses1. ( ) Each cell is a little body living on its own. It moves, digests, grows, excretes (排泄) and reproduces. But,living as it does in a community of cells, it is not independent at all. The specialized cells of the body are dependent on each other for such things as nourishment and the removal of their waste matter. For example, if the digestive cells of the food canal do not perform their function properly, the muscle cells will not receive nourishment, or if the excreting cells don't take away poisonous waste, the cells of the body will be poisoned and die. Some cells of the body move, but not many. It is not necessary for the majority to move. 2. ( ) All the cells of the body need food. They receive their food from a fluid called lymph (淋巴), which permeates all the tissues and bathes the individual cells. The lymph circulates through the tissues, carrying foodobtained into the food canal, the intestines (肠子). 3. ( ) All cells excrete waste matter. When the food has been used, the waste matter which the cells don't requireis passed into the circulating lymph and thus carried away. It is taken to the cells of the organs which arespecialized for removing waste matter from the body. 4. ( ) All the cells reproduce their own kind and grow. In performing their work cells become tired, worn out anddie. If the tissue of the organ is to maintain its health, new cells are required to replace the old ones. The healthy cells accomplish this by splitting their bodies, so that one cell becomes two cells and the two cells fourand so on. These cells are young and small, but still carry on the function of the organ. 5. ( ) It is plain, therefore, that each organ of the body must perform its work well if the other organs are to maintain their health. When they are all functioning well, the body is healthy. The individual is vigorous (强健的) and free from discomfort of any kind. When any organ fails to do its work, all the organs are liable to become affected; changes take place in their cells and their functions are disordered. Such changes giverise to sensations of sickness, pain, loss of strength, bad appetite, fever, and so on. The body is said to be diseased. 查看答案
题型：单项选择题 下列说法中不完整的为( )。A．为了防止大量热、蒸汽或有害物质向人员活动区散发，防止有害物质对环境的污染，必须从总体规划、工艺、建筑和通风等方面采取有效的综合预防和治理措施B．放散有害物质的生产过程和设备，宜采用机械化、自动化，并应采取密闭、隔离和负压操作措施C．对于生产过程中不可避免放散的有害物质，在排放前，必须采取通风净化措施D．对于生产过程中不可避免放散的有害物质，向大气排放时，应符合排放标准的要求 查看答案
