有缺陷存在，但在仪器示波屏上不显示缺陷回波的探伤方法称为（）。A、反射法 B、穿透法

滑动摩擦系数μ的大小与相互接触的物体的材料以及它们的表面的情况（光滑、温度、湿度等）有关，与接触面积的大小（）。

A、无关

B、接触面积越大，滑动摩擦系数μ就越大

C、接触面积越大，滑动摩擦系数μ就越小

D、接触面积越大，滑动摩擦系数μ就越大，但不成正比例

医疗用毒性药品系指（）

A.连续使用后易产生身体依赖性，能成瘾癖的药品

B.毒性剧烈、治疗剂量与中毒剂量相近，使用不当会致人中毒或死亡的药品

C.正常用法用量下出现与用药目的无关的或意外不良反应的药品

D.直接作用中枢神经系统，毒性剧烈的药品

E.毒性剧烈，连续使用后易产生较大毒副作用的药品

油库道路的出入口是如何规定的？（）

A、一、二、三级油库不宜少于两处

B、一、二、三级油库不宜少于三处

C、四、五级油库可设一处

D、四、五级油库可设两处

Research on animal intelligence always makes us wonder just how smart humans are. (1) the fruit-fly experiments described by Carl Zimmer in the Science Times. Fruit flies who were taught to be smarter than the average fruit fly (2) to live shorter lives. This suggests that (3) bulbs burn longer, that there is a(n) (4) in not being too bright.

Intelligence, it (5) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (6) the starting line because it depends on learning — a(n) (7) process — instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (8) .

Is there an adaptive value to (9) intelligence That’s the question behind this new research. Instead of casting a wistful glance (10) at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real (11) of our own intelligence might be. This is (12) the mind of every animal we’ve ever met.

Research on animal intelligence also makes us wonder what experiments animals would (13) on humans if they had the chance. Every cat with an owner, (14) , is running a small-scale study in operant conditioning. We believe that (15) animals ran the labs, they would test us to (16) the limits of our patience, our faithfulness, our memory for locations. They would try to decide what intelligence in humans is really (17) , not merely how much of it there is. (18) , they would hope to study a(n) (19) question: Are humans actually aware of the world they live in (20) the results are inconclusive.

17（）

A.at

B.for

C.after

D.with

所有接地应用线码或扎带固定，固定间距不正确的为（）。

A、0.3m

B、0.4m

C、0.5

D、0.8