航空器在地面等待时，如收到爆炸物的威胁，航空器不得起飞，同时要第一时间通知（）。 A

根据短文内容，判断下列句子的正误，正确的用“T”，错误的用“F”。

     An old scientist recently made several tests with different animals to find out which was cleverer than other

animals.

     In one test the old scientist put a monkey in a room where there were several boxes. Some boxes were inside

other boxes. One small box had some food in it. The scientist wanted to watch the mokey and to find out how

long it would take the monkey to find the food. The scientist left the room, he waited a few minutes outside the

door. Then he got down on his knees and put his eye to the keyhole. What did he see? To his surprise, he found

himself looking into the eye of the monkey. The monkey was on the other side of the door and looked at the

scientist through the keyhole.

( ) 1. The scientist wondered if the monkey was cleverer than other animals.

( ) 2. In one test the scientist put a monkey into a box where there was some food.

( ) 3. After the scientist left the room, the monkey began to eat food.

(     ) 4.Tthe scientist looked at the monkey through the keyhole with his eye.

( ) 5. To the scientist's surprise, the monkey put its eye to the keyhole.

读材料回答：

       亚洲众多的人口，对资源和环境产生了沉重的压力。人口增长了，要求生产更多的粮食。为了满足人口最基本的粮食需求，亚洲的一些国家，一方面在山坡和干旱地带垦荒种粮，造成水土流失和土地沙化；另一方面，在土地上连续耕种，使土地得不到休耕，土壤肥力逐渐下降。结果，粮食的产量下降。然而为了生存，人们又进一步垦殖，形成恶性循环。

（1）亚洲众多的人口，对                和               产生了沉重的压力。

（2）把A—F各内容的字母代号填入下面的框图中。

    A、要求增产粮食 B、开垦坡地和干旱地带 C、粮食产量下降

    D、水土流失和土地沙化加重 E、恶性循环 F、土壤肥力下降

补里管安装前应检查管段、配件的数量何谓质量，以及他们的编号顺序有无错乱。

出口人将汇票连同装运单据一并交给银行，委托其收取货款的托收方式是（）。

A.跟单托收

B.光票托收

C.票据托收

D.信托收据

筛砂机除具有筛分功能外，还具有解把的作用。