人为减少可兴奋细胞外液中（）的浓度，将导致动作电位上升幅度减少。

 小题1:  One of these things is shopping. You can do your shopping from the comfort of your living room if you have a computer and an Internet connection. Most people enjoy shopping but some try to keep it as simple as possible. Shopping online is ideal for the people who find shopping difficult.

The main advantage of online shopping is that you are able to look through various different items without leaving your home. On the internet, you can find all kinds of things.   小题2: Also, you can compare the prices of the items. Thus, you can save a lot of money.

When doing online shopping, it's important to make use of a search engine. There are shopping directories (公司名录） that detail the available online shopping sites.    小题3:  There are probably thousands of sites available on the Internet. Many of the shopping sites operate on the same pattern.

It is also beneficial to you that you can order many items and they will be sent to your houses. You don't need to worry about transportation and shipping. This is because most online shopping sites will deliver the items to your doorstep.    小题4:   This will save you money in the end.

Online shopping is convenient and saves shoppers a lot of time. You save the time that you would have used to drive to a discount store together with your children who shout for everything they see.    小题5:  Also, you save the money spend on gas driving to the discount store.

A．You can avoid this by just clicking your mouse.

B．Be careful and don't let out your personal information.

C．You can chat with the owners of the online shopping sites.

D．With the coming of the Internet, many things have become easier.E.In some cases, online shopping sites provide free shipping for shoppers.

F.Most shopping directories contain customers' reviews on shoppers.

G.It can help when you are shopping for something that is hard to find.

鼻的修饰主要是指（）。

A.晕染鼻侧影

B.涂高光色

C.画鼻根

D.晕染鼻梁

后 * * 吻合术后一般何时拔除导尿管（）。

A．术后2-3周

B．手术10日以后

C．术后8-10日

D．手术12日以后

E．术后3-4周

进行骨吸收的主要细胞为（）。

A.成骨细胞

B.前成骨细胞

C.破骨细胞

D.骨细胞

E.骨衬里细胞

卷烟、雪茄烟生产企业的打、扫码流程为“一打一扫”，“一打”的流程：计划取码→安排生产→生产打码→()。

A．废码回送

B．卷烟出库

C．数据上传

D．出库扫码