防水混凝土抗渗等级不得小于______。
A.P4
B.P5
C.P6
D.P8
参考答案:C
防水混凝土抗渗等级不得小于______。
A.P4
B.P5
C.P6
D.P8
参考答案:C
阅读短文,然后从方框中选出可以填入文中空白处的单词。
What’s the most popular school activity among American students? The 小题1: is the school dance. Most American high schools have at least two dances 小题2: the year, one in winter and the other in spring. Students attend these events 小题3: it’s a great opportunity for them to meet 小题4: friends. At the dance, there will be snacks and photo booths (机器拍照亭), as well as strict(严格的) rules to 小题5: create a healthy and enjoyable evening for all students. And all the dancers will be given a security check(安检)before they come into the dance 小题6: . This is acceptable. But some rules may be a little bit over the top(过分). For example, a school once asked 小题7: students to keep a standing position while they were dancing. That 小题8: the students couldn’t do anything freely. You’d 小题9: not break the rules because you’ll be asked to leave there, or even worse, be placed on a do not invite list. |