润肠丸适用于（）
A.燥热便秘
B.血虚便秘
C.阴虚便秘
D.阳虚便秘
E.气虚便秘
参考答案：B
制作硬砂床时要特别注意（）问题。
A.排水
B.通气
C.加固
D.舂实砂层的厚度
In relation to employment law:
(b) Explain the statutory provisions that apply when an employer wishes to modify the content of a labour contract, and the ways in which this may be implemented. (4 marks)
