搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1型题

急性坏死性溃疡性龈炎的主要致病菌是（）。

A.黏性放线菌和牙龈二氧化碳嗜纤维菌

B.金黄色葡萄球菌和链球菌

C.梭形杆菌和奋森螺旋体

D.牙龈卟啉单胞菌和放线共生放线杆菌

E.变性链球菌和嗜酸乳杆菌

答案

参考答案：C

解析：急性坏死性溃疡性龈炎又名梭螺菌龈炎，以梭形杆菌和奋森螺旋体为主要病原菌。

填空题

Play is very important for humans from birth to death. Play is not meant to be just for children. It is a form of (1) that can tap into your creativity, and can allow you the chance to find your inner child and the inner child of others. I have collected the (2) of play here.
Play can stimulate you (3) . It can go against all the rules, and change the same (4) . Walt Disney was devoted to play, and his willingness to (5) changed the world of entertainment. The next time you are stuck in a (6) way of life, puI1 out a box of color pencils, modeling clay, glue and scissors, and (7) and break free. You will be amazed at the way your thinking (8) .
Playing can bring greater joy into your life. What do you think the world would be like if (9) each day in play I bet just asking you this question has (10) . Play creates laughter, joy, entertainment, (11) . Starting today, try to get 30 minutes each day to engage in some form of play, and (12) rise!
Play is known (13) . Studies show that, as humans, play is part of our nature. We have the need to play because it is instinctive and (14) . With regular play, our problem-solving and (15) will be in much better shape to handle this complex world, and we are much more likely to choose (16) as they arise. It creates laughter and freedom that can instantly reduce stress and (17) to our daily living.
Play can (18) , curiosity, and creativity. Research shows that play is both a "hands-on" and "minds-on" learning process. It produces a deeper, (19) of the world and its possibilities. We begin giving meaning to life through story making, and playing out (20) .
查看答案
单项选择题

在电气工程中，构成电动机控制和保护的组合装置是限流熔断器与（）。

A.接触器

B.断路器

C.负荷开关

D.隔离开关
查看答案