我国沿海地区气象灾害多、损失重，每年平均有（）个热带气旋（含台风）登陆我国，对经济社

Cathy spent a lot of money on her son’s study.

A．cost;about

B．took;for

C．spent;in

D．paid;for

对农作物来说，呼吸作用越强越好．______．

Questions from 31 to 35 are based on the following passage: Generally, cargo is carried in containers, but sometimes it is still shipped as breakbulk cargo. During the voyage, goods may be stacked on top of or come into violent contact with other goods. And the cargo might be dragged, pushed, rolled, or dropped during unloading, while moving through customs, or in transit to the final destination. Moisture is a constant concern because condensation may develop in the hold of a ship even if it is equipped with air conditioning and a dehumidifier(除湿机). Another aspect of this problem is that cargo may also be unloaded in precipitation, or the foreign port may not have covered storage facilities. Buyers are often familiar with the port systems overseas, so they will often specify packaging requirements. If the buyer does not specify this, be sure the goods are prepared using these guidelines: Pack in p containers, adequately sealed and filled when possible. To provide proper bracing in the container, regardless of size, make sure the weight is evenly distributed. Goods should be palletized when possible containerized. Packages and packing filler should be made of moisture-resistant material. To avoid pilferage, avoid writing contents or brand names on packages. Other safeguards include using straps, seals, and shrink wrapping. Observe any product-specific hazardous materials packing requirements. Normally, air shipments require less heavy packing than ocean shipments, though they should still be adequately protected, especially if they are highly pilferable. Finally, because transportation costs are determined by volume and weight, specially reinforced and lightweight packing materials have been developed for exporting. Packing goods to minimize volume and weight while reinforcing them may save money, as well as ensure that the goods are properly packed.

Moisture has long been the concern in export business, of which the reasons are stated except（）

A．human-caused factors

B．unloading in precipitation

C．condensation in the ship’s hold

D．poor storage facilities

二战后存在两种比较突出的现象，--是各类经济组织（如欧盟、亚太经合组织等)举行与经济有关的峰会(如G20峰会)大大增加,二是军事冲突此起彼伏(如伊拉克战争、利比亚战争等)。对此现象理解最准确的是

A．和平与动荡并存成为当今世界形势的特点

B．强权政治威胁世界和平

C．一超多强格局遭受巨大挑战

D．经济区域化成为世界经济发展主流

有关梅克尔憩室的解剖与生理基础描述错误的是（）。

A.回肠末端，距回盲瓣约0.5～1cm处，有些人有一囊状突起长约5cm，口径与回肠相似

B.是胚胎时期卵黄囊管的遗迹

C.梅克尔憩室的发生率约为2%

D.只有25%～30%的人有症状

E.梅克尔憩室都有异位胃黏膜