吊扇安装中,吊扇的挂钩直径不应小于悬挂销钉的直径,且不得小于()mm。
A. 5
B. 10
C. 15
D. 20
返回字符表达式中值的最小值的函数为
Avg
B. Count
C. Max
D. Min
宽度大于()m的房间,除两侧各布置一排边墙型喷头外,还应在房间中间布置标准喷头。
A. 5.2
B. 6
C. 7.2
D. 7
He has (less friends) (in) his classes now (than) he (had) last year.
A. less friends
B. in
C. than
D. had