水泥基或石膏基自流平砂浆地面施工时,现场应封闭,严禁()。
参考答案:交叉作业
Mr. Smith’s never angry with their daughter. __________ Mrs. Smith.
A.So is
B.So has
C.Neither is
D.Neither has
一个小组有若干人,新年互送贺卡一张,已知全组共送贺卡42张,则这个小组有( )人。