（）禁止在高压电气设备上作为安全辅助用具使用。A．低压绝缘鞋 B．中压绝缘鞋 C．高

椎管梗阻

A．4～12mg
B．5～12mg
C．10～20mg
D．15～40mg
E．50～120mg

进口特定产品成套散件或零部件每套价格总额达到同型号产品整机价格的 ____即视为整机进口，并按整机进口办理有关进口手续。

A．50%及以上

B．60%及以上

C．65%及以上

D．80%及以上

“鹤立鸡群”中的“鹤”和“万绿丛中一点红”中的“红”容易被人们知觉到，这种现象所体现的知觉性特性是（ ）

A．整体性

B．选择性

C．理解性

D．恒常性

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.

4（）

A.tendency

B.advantage

C.inclination

D.priority

表达式“4*10>=65”的值为（）。