下列各项诊断技术中，属于物理参数诊断技术的有( )。 A．压力诊断技术 B．污染诊

International free trade occurs when there are no barriers to trade. Countries can get a lot of benefits from free trade. (31) , all countries choose to adopt protection policies to some extent In this essay, I will give (32) of the arguments in favour of world free trade, describe the methods for the trade protection policies (33) countries erect to protect domestic industries and give the arguments which can be put (34) to justify protectionist policies.
Tariffs are taxes on (35) products. Sometimes, tariffs are known (36) imports duties and customs duties. They can be used (37) raise revenue. But, they are usually used to (38) imports and also to help domestic producers. The effect of imposing (39) tariff is to raise price for domestic consumers, and some consumers will switch consumption (40) imported goods to domestically produced substitutes. (41) are two types of tariffs. One is percentage taxes, it is based on
percentage of value of goods. (42) one is specific (fixed sum taxes), it is based on a fixed tax (43) unit or weight. Quota is a limit on the supply of goods or services. It can be imposed on exports. The domestic market share will increase because of (44) a limit on the quantity of imported goods. However, the price of protected goods will also rise because a quota is to reduce supply. Voluntary export restraint or restriction (45) similar to a quota, but this time the limit on imports arises from a voluntary agreement (46) the exporting and importing countries. For example, the UK had an agreement with Japanese car (47) that they should not take (48) than 10 percent of the UK car market. Exchange control means that a government control on foreign currency controls importers access to foreign currency. This is a (49) which was used by a number of European countries, (50) the UK, in the 1960s and 1970s and is still found in some developing countries.

在数列{a_n}中，a₁=4，a_n+1=2a_n，n∈N^*，则其通项公式为（　　）

A．a_n=2n+1

B．a_n=2n-1

C．an=2n-1

D．an=2n+1

胃迷走神经干切断的并发症不包括（）

A.倾倒综合征

B.腹泻

C.吞咽困难

D.胃内容物滞留

E.胆囊结石

“成交方式”栏应填（）。

A．FOB

B．CFR

C．CIF

D．L/C

[听力原文] 有一位 * * 在出行中遭到了武装力量的猛烈袭击，他和一位士兵逃了出来，不过什么包袱都没来得及带。在回去的路上，他们发现了一个生锈的废铁壶， * * 就让士兵把它拾起来。不料士兵懒得弯腰，就假装没听见， * * 没说什么，自己悄悄弯腰捡起了铁壶。 ？？经过一座小镇时， * * 偷偷地用铁壶从铁匠那儿换了一些钱，又从卖水果的那儿买来十个小橙子。两人继续前进，可再也看不到乡镇了，看到的全是茫茫的荒野。士兵饿坏了，脸色越来越苍白，这时 * * 把藏在衣服里的橙子丢出一个，士兵一见，慌忙捡起来掰开吃。 * * 边走边丢，士兵也就狼狈地弯了十次腰。 * * 笑着对他说：“你这样真是活该啊!要是你刚才弯一次腰，现在就不会不停地弯腰了。小事不干，将来就会在更小的事情上操劳。” 回去的路上 * * 做了什么？（）

A．袭击了别人 

B．捡起了铁壶 

C．抢回了包袱 

D．吃掉了橙子