土工合成材料的直剪摩擦试验，所用直剪仪有以下哪两种( ) A．接触面积不变 B．接触

此举的政策含义是( )。

A．央行全面收紧信用

B．央行全面扩张信用

C．央行调整信用结构

D．央行控制物价上涨

婴幼儿腹泻湿热泄泻证的治法是

A．消食导滞，和中止泻

B．疏风散寒，理气化湿

C．清热利湿，清肠止泻

D．健脾益气，升提助运

E．补脾温肾，固涩止泻

简述指导教学的主要活动或要素。

我从来没有A离开B农村，外面的世界对我来说C是陌生的D。

A．过

B．过

C．过

D．过

Our ape-men forefathers had no obvious natural weapons in the struggle for (1) in the open. They had neither the powerful teeth nor the p claws of the big cats. They could not (2) with the bear, whose strength, speed and claws (3) an impressive " small fire" weaponry. They could not even defend themselves (4) running swiftly like the horses, zebras or small animals. If the ape-men had attempted to compete on those terms in the open, they would have been (5) to failure and extinction. But they were (6) with enormous concealed advantages of a kind not possessed by any of their competitors.

In the search (7) the pickings of the forest, the ape-men had (8) efficient stereoscopic vision and a sense of color that the animals of the grasslands did not (9) . The ability to see clearly at close range permitted the ape-men to study practical problems in a way that lay far (10) the reach of the original inhabitants of the grassland. Good long-distance sight was (11) another matter. Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the (12) the viewpoint, the greater the range of sight-so (13) they had had to do was climb a tree. Out in the open, however, this simple solution was not (14) . Climbing a hill would have helped, but in many places the ground was flat. The ape-men (15) the only possible solution. They reared up as high as possible on their hind limbs and began to walk (16) . This vital change of physical position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became (17) still. (18) , they persevered and their bone structure gradually became (19) to the new, unstable position that (20) them the name Homo erectus, upright man.

16（）

A.fast

B.stably

C.happily

D.upright