为了确保IC不被损伤，焊接IC脚的时间〈烙铁碰触到IC脚算起〉应小于等于（）秒。
A.10
B.3
C.25
D.60
参考答案：B
In fact, the renovation is just one move in a huge project to improve Chinese teachers’ housing ______ in recent years.
A．situations
B．equipment
C．circumstances
D．conditions
淋巴导管包括（）。
A.胸导管和右淋巴导管
B.左腰干
C.乳糜池
D.右腰干
E.肠干
