For this part, you are allowed fifteen minutes to write a letter. Suppose you are Zhang Ying. Write a letter to Xiao Wang, a schoolmate of yours who is going to visit you during the weeklong holiday. You should write according to the suggestions given below.

1) Welcome him;

2) Give some suggestions on how he spends the holiday;

3) Something detailed to be paid attention to.

对于操作高速回转机械作业时，可使用防振手套。某些维护设备和注油作业时，应使用防油手套，以避免油类对手的侵害。