学生心理的发展有（）A、连续性与阶段性 B、定向性与顺序性 C、不平衡性 D、差异性

如果工程量清单中某项工程细目承包人在投标时未填写单价，则在计量并支付时，应由监理工程师与业主和承包人协商确定单价及支付费用。 ( )

读图。1959年宁乡黄材出土的商代的224只小青铜斧，是我国迄今发现最早的金属称量货币。回答第2、3题。　　　　　　　　　　　　　　　　　　　　　

小题1:从货币角度看，这些小青铜斧的本质是

A．商品

B．价格

C．贵金属

D．一般等价物小题2:在当时的经济生活中，这种小青铜斧的基本职能包括

A．价值尺度、流通手段

B．价值尺度、支付手段

C．支付手段、世界货币

D．贮藏手段、世界货币

计划免疫规定婴儿6个月以前应先后接受卡介苗、乙型肝炎、白喉、百日咳、破伤风及脊髓灰质炎等疫苗的免疫接种。

Here’s an amazing way to get a hard-boiled egg into a bottle, even though the mouth of the boiled is smaller than the egg! What’s more, you don’t even need to touch the egg to get it to go in!

For this experiment you will need:

·a hard-boiled egg

·a glass bottle with a mouth just slightly smaller than the egg (a fruit-drink bottle works well)

·a 8-cm by 8-cm(3-inch by 3-inch)piece of newspaper

·a match

Remove the shell from the egg. Set the egg on the mouth of the bottle to see that the egg does not fit through the mouth.

Light the paper. Remove the egg from the mouth of the bottle and drop the burning paper into the bottle. Before the fire goes out, set the egg back onto the mouth of the bottle. Within a few seconds the egg will squeeze(挤) through the mouth and into the bottle.

As it entered the bottle, the egg may have broken into pieces. This happens when the diameter(直径) of the egg is more than about 0.5 cm(about 3/16 inch) larger than the diameter of the bottle’s opening.

Why does the egg slide into the bottle, even though no one is pushing it? Because the pressure of the air is pushing it. Before the burning paper is put into the bottle, the pressure of the air inside is the same as outside. The burning paper, however, heats the air inside. This causes the air inside to expand. When the egg is placed on top of the bottle, it seals(封住) the bottle. When the fire goes out, the air inside cools. As it cools, the air contracts(紧缩), and the pressure of the air inside becomes less than the pressure outside. Then, the higher outside pressure pushes the egg into the bottle!

小题1:The best title of this passage can be      .

A．An interesting story

B．The pressure of the air

C．Egg in a bottle

D．Egg, bottle and match小题2:What don’t you need in this experiment?

A．Eggs.

B．Water.

C．Bottles.

D．Paper.小题3:Why will the egg break into pieces while entering the bottle?

A．Because of the burning paper.

B．Because the diameter of the egg is too larger than that of the bottles opening.

C．Because it is cool inside the bottle.

D．Because the pressure of the air inside is larger.小题4:What is the most important to get the egg into a bottle?

A．A match.

B．A fruit-drink bottle.

C．The pressure of the air.

D．The burning paper.

小口氏病患者，在暗室2-3小时后，视网膜的颜色可恢复正常桔红色，称为水尾现象。此病呈常染色体隐性遗传（）