数据-1，0，3，5，x的极差是7，则x的值是______．

男性，58岁。突然呕血300ml，排不成形黑便2次共约200ml。查体：BP100/70mmHg，心率112次／分，心律齐，无杂音，腹软，脾肋下2cm，移动性浊音阳性。心电图示在V₄、V₅导联ST段水平下移1mm。下列处理错误的是（）

A.立即输血

B.口服正肾冰盐水

C.应用静脉止血药物

D.静脉应用抑酸药物

E.垂体后叶素静滴

划分土地级别后，测算级别地价时调查的样本资料要求( )。

A．近期连续三年数据，每级样本总数不少于20个

B．近期连续两年数据，每级样本总数不少于20个

C．近期连续两年数据，每级样本总数不少于30个

D．上一年数据，每级样本总数不少于30个

网上拍卖的必要性及特点

保险单的签发日期可以与运输单据的开航日期相同。

If you left your book on the table overnight, you would find the following morning that it was still exactly where you had left it, provided nobody had moved it. If a ball is made to roll on a very smooth surface, it will roll a long distance unless something stops it or changes its direction. This tendency of an object to remain at rest unless something moves it and to continue moving unless something stops it is known as the Law of Inertia.

The following examples show the truth of this law.

a. Put a table-cloth on a table and arrange a pile of books on it. Hold one edge of the table-cloth and pull it quickly. The table-cloth will come off, leaving the pile of books undisturbed.

b. Place a small piece of cardboard on an open jar and place a coin on it directly over its mouth. Use one finger to flick the piece of cardboard away. You will notice that the coin drops into the jar.

c. Sitting in a car which starts suddenly, you feel you are jerked backwards. In fact, you are not jerked backwards. Your lower half, which is in contact with the cushion, is forced to move forward with the car, and the upper part of your body, which remained at rest, is left behind.

The Law of Inertia is a law concerning().

A. motion

B. distance

C. position

D. direction