联系上下文，依次填入下列横线最恰当的一项是 [ ] 黄河，中 * * 的母亲河。五

把法律规则分为强行性规则与任意性规则的根据是

A．法律规则是否规定了权利和义务

B．法律规则是否允许主体自行设定权利义务

C．法律规则保护的权益不同

D．法律规则设定的效力不同

句型转换(每小题1分，共5分)

小题1:Lucy’s pen is better than Kate’s.(改为同义句)

Kate’s pen is                    Lucy’s.

小题2:Betty has to take the medicine three times a day.(对画线部分提问)

______  ______  dose Betty                  take the medicine?

小题3:My mother goes to work by bike.(对画线部分提问)

                    Your mother                     to work?

小题4:The twins often visit their uncle on weekends.(用next weekend改写句子)

The twins   ___                  their uncle next weekend.

小题5:He started learning English when he was five years old.(改写句子)

He started learning English ________    ___________  ________  _______.

皇冠式头花象征高贵与权利，要求居中排列，主花突出鲜明，焦点明确。

双皮圈（胶圈）牵伸装置的特点？

什么叫全寿命周期？什么叫全寿命周期费用？