企业员工的分类有哪些？
参考答案：
管理人员、工程技术人员、工人、学徒工、服务人员、其他人员。
墙体沉降缝的构造与伸缩缝的构造基本相同。
He insisted that he from heart trouble, but I didn't think so. [ ]
A. should suffer
B. has suffered
C. suffers
D. was suffering
