下列项目中属于管理费用的是（） A.展览费 B.利息净支出 C.运输费 D.劳动保险

以下关于邻鸦嵌体邻面片切洞型的描述正确的是 （）

A.用于邻面缺损大而浅时

B.可在片切面内制备箱型固位

C.可在片切面内制备小肩台

D.片切面颊舌边缘应达到自洁区

E.用于邻面突度较大时

已知函数f（x）=x³+bx²+cx在x=1处的切线方程为6x-2y-1=0，f′（x）为f（x）的导函数，g（x）=a•e^x（a，b，c∈R）．

（1）求b，c的值；

（2）若存在x₀∈（0，2]，使g（x₀）=f′（x₀）成立，求a的范围．

A.条件（1）充分，但条件（2）不充分.

B.条件（2）充分，但条件（1）不充分.

C.条件（1）和（2）单独都不充分，但条件（1）和条件（2）联合起来充分.

D.条件（1）充分，条件（2）也充分.

E.条件（1）和（2）单独都不充分，条件（1）和条件（2）联合起来也不充分.

一元二次方程ax²+bx+c=0有两个不等的实根．（）
(1)a，b，c是从1，3，5，7中任取三个不同的数字；
(2)b＞a＞c，且c=1．

Even plants can run a fever, especially when they are under attack by insects or disease. But (1) humans, plants can have their temperature (2) from 3,000 feet away—straight up. A decade ago, (3) the infrared scanning technology developed for military purpose and other satellites, physicist Stephen Paley (4) a quick way to take the temperature of crops to determine (5) ones are under stress. The goal was to let farmer (6) target pesticide spraying (7) rain poison on a whole field, which (8) include plants that don’t have the pest problem.

Even better, Paley’s Remote Scanning Services Company could detect crop problem before they became (9) to the eye. Mounted on a plane flown at 3,000 feet (10) , an infrared scanner measured the heat emitted by crops. The data were (11) into a color-coded map showing (12) plants were running "fevers". Farmers could then spot spray, using 50 to 70 percent less pesticide than they (13) would.

The bad news is that Paley’s company closed down in 1984, after only three years. Farmers (14) the new technology and long-term backers were hard (15) . But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to (16) into operation. Agriculture experts have no doubt about the technology works. "This technique can be used (17) 75 percent of agricultural land in the United States," says George Oerther of Texas A＆M. Ray Jackson, who recently retired from the Department of Agriculture, thinks (18) infrared crop scanning could be adopted by the end of the decade. But (19) Paley finds the financial backing (20) he failed to obtain 10 years ago.

8（）

A.dominantly

B.deliberately

C.accidentally

D.invariably

不安

A．あのころはやりたいことも仕事もみつからず、毎日が不安だった。

B．親を不安させないように、病気のことは言わないでおこう。

C．　一人で会場まで行けるか不安の人は手をあげてください。

D．きのうは夫の帰りが遅くて不安した。